Post on 22-Jan-2016
description
Cold milling machines
Calculating the working performance
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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500
Hard asphalt
Soft asphalt
Most common working range
2 // 3
Contents
Purpose of this brochure 4
How to use this brochure to determine the performance values 6
Performance diagrams and sample calculations for:
Cold milling machine W 350 8
Cold milling machine W 35 10
Cold milling machine W 35 DC 12
Cold milling machine W 500 14
Cold milling machine W 50 16
Cold milling machine W 50 DC 18
Cold milling machine W 600 DC 20
Cold milling machine W 1000 L 22
Cold milling machine 1000 C 24
Cold milling machine W 1000 26
Cold milling machine W 1000 F 28
Cold milling machine W 1200 F 30
Cold milling machine W 1300 F 32
Cold milling machine 1300 DC 34
Cold milling machine 2000 DC 36
Cold milling machine W 1500 38
Cold milling machine W 1900 40
Cold milling machine W 2000 42
Cold milling machine 2100 DC 44
Cold milling machine W 2100 46
Cold milling machine W 2200 48
the machine parameters
the material parameters
the site conditions
the traffic situation
the transport capacity for transport of the milled material
the experience of the operating staff.
This brochure has been compiled on the basis of Wirtgen’s
decades of know-how and customers’ practical experience
in the field, in order to provide the user with a useful tool for
calculating the working performance of his machines.
The output of a milling machine in practice depends on numerous influencing factors. The most important of these are:
Purpose of this brochure
This brochure presents performance diagrams of the
Wirtgen milling machines, as determined in extensive
test series involving the milling of asphalt pavements in
Western Europe.
These performance diagrams are supplemented by
mathematical formulas which allow the determination
of the area output achieved in practical site operations.
With the aid of this tool, the user can roughly calculate the
hourly or daily output to be expected of his machine.
However, a few assumptions first have to be made, which
have an effect on the result. The user’s experience in
correctly estimating the prevailing local conditions is of
particular importance in this context.
Despite the good applicability of the diagrams, formulas
and values given, Wirtgen GmbH cannot accept any liability
in relation to the calculation methods. All figures are for
information only and not binding. No part of this brochure
may be reprinted or duplicated.
Milling of complete asphalt pavements in asingle operation.
The heart of the milling machine: the milling drum of a high-capacity machine with easilyreplaceable milling cutters and patented HT3 Plus interchangeable toolholder system.
FrästiefeT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
harter Asphalt
weicher Asphalt
häufigster Arbeitsbereich
VorschubV (m/min)theoretischeFlächenleistungFT (m2/h)
5 // 54 // 5
Machineparameters
Machineparameters
Siteconditions
Trafficsituation
Transportcapacity
Operating staff
Working width Asphalt/Concrete Milling depth Cordoned-off site Number of trucks Experienced/
inexperienced
Engine output Type of rockhard/soft
Unobstructed area Obstacles Organisation
Weight Grain shaperound or broken Partial repair work Traffic situation
Cutting speed Grain distribution
Influencing factorsobstructing work
Type of cuttingtool, spacing
Type of binderhard/soft
Travel drive Crawler track/wheel Temperature
Area output
Factors influencing the milling output
With the aid of this brochure, you can find the right machine for every job. This guaranteesmaximum economy and rapid site completion.
Highly manoeuvrable small milling machinesreduce the amount of re-work required.
How to use this brochure to determinethe performance values
1. Selecting the type of machine
The type of machine to be used for a construction job has to
be selected first, so that its performance data can be deter-
mined. A total of 21 different types of machines – both from
Wirtgen’s current range and older models – are available for
this purpose in this brochure.
2. Determining the theoretical area output from
the diagram
Starting with the selected milling depth and the assumed
pavement hardness (N.B.: This has a major influence on the
milling output!), the rate of advance in m/min and the asso-
ciated theoretical area output in m2/h are determined from
the appropriate diagram. If the probable pavement hardness
is not known, it may be advisable to carry out the calcula-
tions below using different assumed values.
3. Determining the allowance factor
The allowance factor must now be determined for the
construction project to which the calculations apply. These
factors are listed both for work in built-up areas and for work
in open country. These values are not fixed, but usually vary
within a certain range.
The following facts may considerably reduce the
performance in practice:
Long delays waiting for trucks
Several, separate areas to be milled, requiring repeated
transfer of the machine
Traffic impeding the milling work
Obstacles in the road (manhole covers, hydrants, gas
and water valves, rainwater inlets, etc.)
Winding roads, uphill and downhill work, etc.
Inclement weather
Other factors obstructing the work or unavoidable
interruptions.
Under certain circumstances, it may be useful to perform
the calculations using two different allowance factors.
4. Calculating the practical output data
The practical milling output, the reclaimed quantities and
volumes, and also the working time required, can now be
calculated with the aid of the formulas given here.
Two complete typical sample calculations are included
for each of the 21 types of machine, in order to explain the
procedure. These examples apply when milling asphalt
pavements at a ground temperature of approx. 15 °C.
6 // 7
The high output of the milling machine requires the availability of sufficient truck capacity to take away the reclaimed material. Calculatingthe milling output permits accurate estimation of the volume of reclaimed material, resulting in highly economical operations.
Additional points to be considered:
Temperature of the pavement to be milled
In practice, the achievable milling output essentially
depends, among other things, on the temperature of the
pavement. In this context, the values given in this brochure
refer to a ground temperature of approx. 15 °C.
The binder (bitumen) becomes softer at higher temperatures.
The result is an increase in the milling output, as the entire
pavement can be detached more easily and the milling
machine encounters less resistance. The reverse applies at
lower temperatures, in which case a lower practical milling
output must be expected.
As a mathematical rule-of-thumb, it can be anticipated
that roughly 60 % of the listed output can be achieved at
a ground temperature of 0 °C. In contrast, 1.3 times the
practical milling output can be expected at a ground
temperature of 30 °C:
0 °C: Area output at 0 °C = 0.6 x Area output
at 15°C
30 °C: Area output at 30 °C = 1.3 x Area output
at 15 °C
To be calculated differently:
Milling of concrete surfaces
The calculations and examples presented in this brochure
refer exclusively to the milling of asphalt surfaces. The use
of the curves is limited to making estimates when milling
concrete. To this end, the value for the theoretical area
output when milling hard asphalt must be multiplied by a
factor of 0.3. This gives a rough estimate of the practical
milling capacities to be expected when milling concrete.
When milling concrete, there is no need for the approximate
calculation to include any temperature influence on the
milling output.
Moreover, when milling concrete, it must also be borne
in mind that the theoretical milling depth of the type of
machine involved cannot be exploited to such a great
extent as when milling asphalt.
Cold milling machine W 350
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output ................................................. 42 kW/56 HP/57 PS
Milling width .................................................................................. 35 cm
Milling depth ............................................................................ 0–10 cm
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Theoretical performance values:Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
FrästiefeT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
harter Asphalt
weicher Asphalt
häufigster Arbeitsbereich
VorschubV (m/min)theoretischeFlächenleistungFT (m2/h)
8 // 9
Sample calculation 1
Job: Partial repair of the pavement
of a motorway tangent
Milling depth: T = 3.5 cm
Total milled area: FF = 26 m2
Pavement: Mastic asphalt, hard
Determination of the theoretical area output
from the diagram: FT = 60 m2/h
Selection of the allowance factor
As a continuous area without obstruction due to traffic is to be
milled, a factor of 0.6 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 60 FP = 36 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 36 x 3.5 x 0.013 QV = 1.6 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 36 x 3.5 x 0.024 QT = 3.0 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 26 x 3.5 x 0.013 QGV = 1.2 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 26 x 3.5 x 0.024 QGT = 2.2 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 26/ 36 Z = 0.7 h, i.e. approx. 1 working hour
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
60 m2/h
Sample calculation 2
Job: Milling off the top course
of a parking deck
Milling depth: T = 1.5 cm
Total milled area: FF = 4,000 m2
Pavement: Mastic asphalt, moderately hard, cracked
Determination of the theoretical area output
from the diagram: FT = 145 m2/h
Selection of the allowance factor
A continuous area is to be milled here, although supporting pillars
impede the workflow in some places. A factor of 0.5 is therefore
selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 145 FP = 72.5 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 72.5 x 1.5 x 0.013 QV = 1.4 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 72.5 x 1.5 x 0.024 QT = 2.6 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 4,000 x 1.5 x 0.013 QGV = 78 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 4,000 x 1.5 x 0.024 QGT = 144 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 4,000/72.5 Z = 55.2 h, i.e. 55–56 working hours
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
145 m2/h
Cold milling machine W 35
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output ...................................... 31.5 kW/42.2 HP/42.8 PS
Milling width .................................................................................. 35 cm
Milling depth .............................................................................. 0–6 cm
Theoretical performance values:Milling depthT (cm)
10
9
8
7
6
5
4
3
2
1
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
10 // 11
Sample calculation 1
Job: Demarkation
Milling depth: T = 0.2 cm
Total milled area: FF = 5,000 lfm x 0.3 m
Pavement: Coloured marking on asphalt surface course
Determination of the theoretical area output
from the diagram: FT = 360 m2/h
Selection of the allowance factor
As a continuous marking with very few interruptions is involved,
a factor of 0.7 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.7 x 360 FP = 252 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0,013
QV = 252 x 0.2 x 0.013 QV = 0.66 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 252 x 0.2 x 0.024 QT = 1.21 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 1,500 x 0.2 x 0.013 QGV = 3.9 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0,024
QGT = 1,500 x 0.2 x 0.024 QGT = 7.2 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 1,500/252 Z = 5.95 h, i.e. 6 working hours
Milling depthT (cm)
10
9
8
7
6
5
4
3
2
1
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
360 m2/h
Sample calculation 2
Job: Milling off the surface course of a car park
Milling depth: T = 1 cm
Total milled area: FF = 2,500 m2
Pavement: Mastic asphalt, moderately hard, cracked
Determination of the theoretical area output
from the diagram: FT = 150 m2/h
Selection of the allowance factor
A continuous area is to be milled here, although supporting pillars
impede the workflow in some places. A factor of 0.6 is therefore
selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 150 FP = 90 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 90 x 1 x 0.013 QV = 1.17 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 90 x 1 x 0.024 QT = 2.16 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 2,500 x 1 x 0.013 QGV = 32.5 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 2,500 x 1 x 0.024 QGT = 60 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 2,500/90 Z = 27.78 h, i.e. approx. 28 working hours
Milling depthT (cm)
10
9
8
7
6
5
4
3
2
1
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
150 m2/h
Cold milling machine W 35 DC
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output ............................................. 42.5 kW/56 HP/58 PS
Milling width .................................................................................. 35 cm
Milling depth ............................................................................ 0–11 cm
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Theoretical performance values:Milling depth T (cm)11
10
9
8
7
6
5
4
3
2
1
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
12 // 13
Sample calculation 1
Job: Partial repair of the pavement of a motorway tangent
Milling depth: T = 4 cm
Total milled area: FF = 600 m2
Pavement: Mastic asphalt, hard
Determination of the theoretical area output
from the diagram: FT = 110 m2/h
Selection of the allowance factor
As a continuous area is to be milled, without obstruction to traffic,
a factor of 0.5 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 110 FP = 55 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 55 x 4 x 0.013 QV = 2.86 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 55 x 4 x 0.024 QT = 5.28 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 600 x 4 x 0.013 QGV = 31.2 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 600 x 4 x 0.024 QGT = 57.6 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 600/55 Z = 10.9 h, i.e. 11 working hours
Milling depth T (cm)11
10
9
8
7
6
5
4
3
2
1
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
110 m2/h
Sample calculation 2
Job: Milling off the surface course in a hall
Milling depth: T = 2 cm
Total milled area: FF = 2,000 m2
Pavement: Concrete screed
Determination of the theoretical area output
from the diagram: FT = 135 m2/h
Selection of the allowance factor
A continuous area is to be milled here, although supporting pillars
impede the workflow in some places. A factor of 0.6 is therefore
selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 135 FP = 81 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 81 x 2 x 0.013 QV = 2.106 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 81 x 2 x 0.024 QT = 3.888 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 2,000 x 2 x 0.013 QGV = 52 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 2,000 x 2 x 0.024 QGT = 96 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 2,000/81 Z = 24.7 h, i.e. approx. 25 working hours
Milling depth T (cm)11
10
9
8
7
6
5
4
3
2
1
00 2 4 6 8 10 12 14 16 18 20 22
0 50 100 150 200 250 300 350 400 450
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
135 m2/h
Cold milling machine W 500
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output ............................................ 79 kW/105 HP/107 PS
Milling width .................................................................................. 50 cm
Milling depth ............................................................................ 0–16 cm
Theoretical performance values:Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Hard asphalt
14 // 15
Sample calculation 1
Job: Milling off a 300 m2 section of a main road
through a town with rainwater inlets
Milling depth: T = 9 cm
Total milled area: FF = 300 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 140 m2/h
Selection of the allowance factor
On account of the numerous rainwater inlets and other obstacles,
a factor of 0.5 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 140 FP = 70 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0,013
QV = 70 x 9 x 0.013 QV = 8.2 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 70 x 9 x 0.024 QT = 15.1 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 300 x 9 x 0.013 QGV = 35.1 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 300 x 9 x 0.024 QGT = 64.8 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 300/70 Z = 4.3 h, i.e. 4-5 working hours
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
Hard asphalt
140 m2/h
Sample calculation 2
Job: Milling off the wearing course
of a rural access road
Width: 2.5 m Length: 800 m
Milling depth: T = 4 cm
Total milled area: FF = 2,000 m2
Pavement: Asphalt, readily millable
Determination of the theoretical area output
from the diagram: FT = 370 m2/h
Selection of the allowance factor
As no obstruction due to traffic is anticipated, a factor of 0.6
is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 370 FP = 222 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 222 x 4 x 0.013 QV = 11.5 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 222 x 4 x 0.024 QT = 21.3 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 2,000 x 4 x 0.013 QGV = 104 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 2,000 x 4 x 0.024 QGT = 192 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 2,000/222 Z = 9 h, i.e. approx. 9 working hours
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
Hard asphalt
370 m2/h
Cold milling machine W 50
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output ................................................. 60 kW/80 HP/82 PS
Milling width .................................................................................. 50 cm
Milling depth ............................................................................ 0–16 cm
Theoretical performance values:Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
17 // 1716 // 17
145 m2/h
Sample calculation 1
Job: Milling off a 300 m2 section of a main road
through a town with rainwater inlets
Milling depth: T = 9 cm
Total milled area: FF = 300 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 102.2 m2/h
Selection of the allowance factor
On account of the numerous rainwater inlets and other obstacles,
a factor of 0.5 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 102.2 FP = 51.1 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 51.1 x 9 x 0.013 QV = 6.0 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 51.1 x 9 x 0.024 QT = 11 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 300 x 9 x 0.013 QGV = 35.1 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 300 x 9 x 0.024 QGT = 64.8 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 300/51.1 Z = 5.9 h, i.e. approx. 6 working hours
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
102,2 m2/h
Sample calculation 2
Job: Milling off the wearing course
of a rural access road
Width: 2.5 m Length: 800 m
Milling depth: T = 4 cm
Total milled area: FF = 2,000 m2
Pavement: Asphalt, readily millable
Determination of the theoretical area output
from the diagram: FT = 379.3 m2/h
Selection of the allowance factor
As no obstruction due to traffic is anticipated, a factor of 0.6
is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 379.3 FP = 227.6 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 227.6 x 4 x 0.013 QV = 11.8 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 227.6 x 4 x 0.024 QT = 21.8 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 2,000 x 4 x 0.013 QGV = 104 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 2,000 x 4 x 0.024 QGT = 192 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 2,000/227.6 Z = 8.8 h, i.e. approx. 9 working hours
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
379,3 m2/h
Hard asphalt
Soft asphalt
Most common working range
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output ............................................ 92 kW/123 HP/125 PS
Milling width .................................................................................. 50 cm
Milling depth ............................................................................ 0–21 cm
Theoretical performance values:Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600
Advance speedV (m/min)Theoretical area outputFT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Cold milling machine W 50 DC
18 // 19
Sample calculation 1
Job: Milling off the wearing course
of a main road through a town
Milling depth: T = 8 cm
Total milled area: FF = 2,000 m2
Pavement: Asphalt, soft
Determination of the theoretical area output
from the diagram: FT = 245 m2/h
Selection of the allowance factor
A factor of 0.5 is selected, as the areas to be milled are contiguous,
but contain rainwater inlets.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 245 FP = 122.5 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 122.5 x 8 x 0.013 QV = 12.7 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 122.5 x 8 x 0.024 QT = 23.5 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 2,000 x 8 x 0.013 QGV = 208 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 2,000 x 8 x 0.024 QGT = 384 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 2,000/122.5 Z = 16,3 h, i.e. 16-17 working hours
Hard asphalt
Soft asphalt
Most common working range
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600
Advance speedV (m/min)Theoretical area outputFT (m2/h)
245 m2/h
Sample calculation 2
Job: Milling off a strip of pavement from a car park
Width: 10.0 m Length: 250 m
Milling depth: T = 16 cm
Total milled area: FF = 2,500 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 97.4 m2/h
Selection of the allowance factor
Work is not likely to be obstructed and there is sufficient transport
capacity available. The factor 0.7 is therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.7 x 97.4 FP = 68.2 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 68.2 x 16 x 0.013 QV = 14.2 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 68.2 x 16 x 0.024 QT = 26.2 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 2,500 x 16 x 0.013 QGV = 520 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 2,500 x 16 x 0.024 QGT = 960 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 2,500/68.2 Z = 36.7 h, i.e. 36-37 working hours
Hard asphalt
Soft asphalt
Most common working range
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600
Advance speedV (m/min)Theoretical area outputFT (m2/h)
97,4 m2/h
Hard asphalt
Soft asphalt
Most common working range
Cold milling machine W 600 DC
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 129 kW/173 HP/175 PS
Milling width .................................................................................. 60 cm
Milling depth ............................................................................ 0–30 cm
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24
0 100 200 300 400 500 600 700 800
Advance speedV (m/min)Theoretical area output FT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
20 // 21
Sample calculation 1
Job: Milling off a strip of pavement on a country road
in order to lay a water pipe
Width: 1.4 m Length: 50 m
Milling depth: T = 30 cm
Total milled area: FF = 70 m2
Pavement: Asphalt, moderately hard or hard
Determination of the theoretical area output
from the diagram: FT = 120 m2/h
Selection of the allowance factor
The reclaimed material remains in the trench, eliminating all delays
due to waiting for trucks. Consequently, a factor of 0.5 is assumed.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 120 FP = 60 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 60 x 30 x 0.013 QV = 23.4 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 60 x 30 x 0.024 QT = 43.2 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 70 x 30 x 0.013 QGV = 27.3 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 70 x 30 x 0.024 QGT = 50.4 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 70/60 Z = 1.2 h, i.e. 1-2 working hours
Hard asphalt
Soft asphalt
Most common working range
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24
0 100 200 300 400 500 600 700 800
Advance speedV (m/min)Theoretical area output FT (m2/h)
120 m2/h
Sample calculation 2
Job: Milling off the wearing and binder courses
of a city-centre crossroads
Milling depth: T = 12 cm
Total milled area: FF = 220 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 310 m2/h
Selection of the allowance factor
Obstructions due to traffic must be expected at the crossroads
and transverse milling is required. A factor of 0.3 is selected for
this reason.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.3 x 310 FP = 93 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 93 x 12 x 0.013 QV = 14.5 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 93 x 12 x 0.024 QT = 26.8 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 220 x 12 x 0.013 QGV = 34.3 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 220 x 12 x 0.024 QGT = 63.4 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 220/93 Z = 2.4 h, i.e. 2-3 working hours
Hard asphalt
Soft asphalt
Most common working range
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24
0 100 200 300 400 500 600 700 800
Advance speedV (m/min)Theoretical area output FT (m2/h)
310 m2/h
Cold milling machine W 1000 L
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 129 kW/173 HP/175 PS
Milling width .................................................................................... 1.0 m
Milling depth ............................................................................ 0–25 cm
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Theoretical performance values:Milling depthT (cm)26
24
22
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area output FT (m2/h)
22 // 23
Sample calculation 1
Job: Milling off the wearing course
of a little-used minor road
Milling depth: T = 4 cm
Total milled area: FF = 3,000 m2
Pavement: Asphalt, soft and crumbly
Determination of the theoretical area output
from the diagram: FT = 890 m2/h
Selection of the allowance factor
The area to be milled can be machined in one piece, but there are
rainwater inlets. Consequently, a factor of 0.6 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 890 FP = 534 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 534 x 4 x 0.013 QV = 27.8 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 534 x 4 x 0.024 QT = 51.3 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 3,000 x 4 x 0.013 QGV = 156 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 3,000 x 4 x 0.024 QGT = 288 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 3,000/534 Z = 5.6 h, i.e. approx. 6 working hours
Milling depthT (cm)26
24
22
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area output FT (m2/h)
890 m2/h
Sample calculation 2
Job: Milling off three sections on a motorway feeder
Milling depth: T = 12 cm
Total milled area: FF = 3 x 60 m2 = 180 m2
Pavement: Asphalt, moderately hard or hard
Determination of the theoretical area output
from the diagram: FT = 320 m2/h
Selection of the allowance factor
As three separate areas are to be milled,
a factor of 0.5 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 320 FP = 160 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 160 x 12 x 0.013 QV = 25 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 160 x 12 x 0.024 QT = 46.1 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 180 x 12 x 0.013 QGV = 28.1 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 180 x 12 x 0.024 QGT = 51.8 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 180/160 Z = 1.1 h, i.e. 1-2 working hours
Milling depthT (cm)26
24
22
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area output FT (m2/h)
320 m2/h
Cold milling machine W 1000 C
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 104 kW/139 HP/142 PS
Milling width .................................................................................... 1.0 m
Milling depth ............................................................................ 0–18 cm
Theoretical performance values:Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
24 // 25
Sample calculation 1
Job: Milling off the wearing course of a main road through a town
Milling depth: T = 4 cm
Total milled area: FF = 3,000 m2
Pavement: Asphalt, soft and crumbly
Determination of the theoretical area output
from the diagram: FT = 650 m2/h
Selection of the allowance factor
A factor of 0.5 is selected, as the areas to be milled are contiguous,
but contain rainwater inlets.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 650 FP = 325 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0,013
QV = 325 x 4 x 0.013 QV = 16.9 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 325 x 4 x 0.024 QT = 31.2 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 3,000 x 4 x 0.013 QGV = 156 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 3,000 x 4 x 0.024 QGT = 288 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 3,000/325 Z = 9.2 h, i.e. 9–10 working hours
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
650 m2/h
Sample calculation 2
Job: Milling off two sections
of a motorway hard shoulder
Milling depth: T = 10 cm
Total milled area: FF = 2 x 90 m2 = 180 m2
Pavement: Asphalt, moderately hard or hard
Determination of the theoretical area output
from the diagram: FT = 220 m2/h
Selection of the allowance factor
A factor of 0.6 is selected, as two separate areas are
to be milled.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 220 FP = 132 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 132 x 10 x 0.013 QV = 17.2 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 132 x 10 x 0.024 QT = 31.7 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 180 x 10 x 0.013 QGV = 23.4 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 180 x 10 x 0.024 QGT = 43.2 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 180/132 Z = 1.4 h, i.e. approx. 2 working hours
Milling depthT (cm)
20
18
16
14
12
10
8
6
4
2
00 2 4 6 8 10 12 14 16 18 20 22
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area outputFT (m2/h)
220 m2/h
Cold milling machine W 1000
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 154 kW/206 HP/209 PS
Milling width .................................................................................... 1.0 m
Milling depth ............................................................................ 0–25 cm
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 200 400 600 800 1000 1200 1400 1600
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area output FT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
26 // 27
Sample calculation 1
Job: Milling off the wearing course of a country road
Milling depth: T = 4 cm
Total milled area: FF = 4,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 960 m2/h
Selection of the allowance factor
The areas to be milled are continuous, but there are traffic islands
and convex bays. Therefore, a factor of 0.5 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 960 FP = 480 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 480 x 4 x 0.013 QV = 25 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 480 x 4 x 0,024 QT = 46.1 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 4,000 x 4 x 0.013 QGV = 208 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 4,000 x 4 x 0.024 QGT = 384 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 4,000/480 Z = 8.3 h, i.e. approx. 9 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 200 400 600 800 1000 1200 1400 1600
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area output FT (m2/h)
960 m2/h
Sample calculation 2
Job: Milling off a strip of pavement
on a runway
Width: 1.0 m Length: 2,000 m
Milling depth: T = 18 cm
Total milled area: FF = 2,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 280 m2/h
Selection of the allowance factor
A factor of 0.6 is selected, as there is nothing to obstruct the work
and sufficient transport capacity is available.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 280 FP = 168 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 168 x 18 x 0.013 QV = 39.3 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 168 x 18 x 0.024 QT = 72.6 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 2,000 x 18 x 0.013 QGV = 468 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 2,000 x 18 x 0.024 QGT = 864 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 2,000/168 Z = 11.9 h, i.e. approx. 12 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 200 400 600 800 1000 1200 1400 1600
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area output FT (m2/h)
280 m2/h
Cold milling machine W 1000 F
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 190 kW/255 HP/258 PS
Milling width .................................................................................... 1.0 m
Milling depth ........................................................................ 0–31.5 cm
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 200 400 600 800 1000 1200 1400 1600
Hard asphalt
Soft asphalt
Most common working range
Advance speed V (m/min)Theoretical area output FT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
28 // 29
Sample calculation 1
Job: Milling off the surface course
of a motorway section
Milling depth: T = 4 cm
Total milled area: FF = 2,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 1,160 m2/h
Selection of the allowance factor
The area to be milled forms a continuous surface and there is
sufficient transport capacity available. The factor 0.6 is therefore
chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 160 FP = 696 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 696 x 4 x 0.013 QV = 36.2 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 696 x 4 x 0.024 QT = 66.8 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 2,000 x 4 x 0.013 QGV = 104 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 2,000 x 4 x 0.024 QGT = 192 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 2,000/696 Z = 2.9 h, i.e. approx. 3 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 200 400 600 800 1000 1200 1400 1600
Hard asphalt
Soft asphalt
Most common working range
Advance speed V (m/min)Theoretical area output FT (m2/h)
Sample calculation 2
Job: Milling off a strip of pavement from a car park
Width: 10.0 m Length: 250 m
Milling depth: T = 20 cm
Total milled area: FF = 2,500 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 310 m2/h
Selection of the allowance factor
Work is not likely to be obstructed and there is sufficient transport
capacity available. The factor 0.7 is therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.7 x 310 FP = 217 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 217 x 20 x 0.013 QV = 56.4 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 217 x 20 x 0.024 QT = 104.2 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 2,500 x 20 x 0.013 QGV = 650 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 2,500 x 20 x 0.024 QGT = 1,200 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 2,500/217 Z = 11.5 h, i.e. approx. 12 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 200 400 600 800 1000 1200 1400 1600
Hard asphalt
Soft asphalt
Most common working range
Advance speed V (m/min)Theoretical area output FT (m2/h)
310 m2/h
1.160 m2/h
Cold milling machine W 1200 F
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 190 kW/255 HP/258 PS
Milling width .................................................................................... 1.2 m
Milling depth ........................................................................ 0–31.5 cm
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area output FT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
30 // 31
Sample calculation 1
Job: Milling off the surface course
of a marginal strip along a main road
Milling depth: T = 4 cm
Width: 1.2 m Length: 10,000 m
Total milled area: FF = 12,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 1,300 m2/h
Selection of the allowance factor
The road is straight, with few junctions. Sufficient transport capacity
is available. The factor 0.6 is therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 1,300 FP = 780 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 780 x 4 x 0.013 QV = 40.6 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 780 x 4 x 0.024 QT = 74.9 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 12,000 x 4 x 0.013 QGV = 624 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 12,000 x 4 x 0.024 QGT = 1,152 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 12,000/780 Z = 15.4 h, i.e. 15–16 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area output FT (m2/h)
1.300 m2/h
Sample calculation 2
Job: Milling off the surface and binder courses
at an inner-city crossroads
Milling depth: T = 18 cm
Total milled area: FF = 300 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 400 m2/h
Selection of the allowance factor
Obstruction due to traffic must be expected in the crossing and
the trucks must travel a long way to reach the site. The factor 0.4
is therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.4 x 400 FP = 160 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 160 x 18 x 0.013 QV = 37.4 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 160 x 18 x 0.024 QT = 69.1 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 300 x 18 x 0.013 QGV = 70.2 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 300 x 18 x 0.024 QGT = 129.6 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 300/160 Z = 1.9 h, i.e. approx. 2 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Hard asphalt
Soft asphalt
Most common working range
Advance speedV (m/min)Theoretical area output FT (m2/h)
400 m2/h
Cold milling machine W 1300 F
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 190 kW/255 HP/258 PS
Milling width ................................................................................. 1.32 m
Milling depth ........................................................................ 0–31.5 cm
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000
Advance speedV (m/min)Theoretical area output FT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Hard asphalt
Soft asphalt
Most common working range
32 // 33
Sample calculation 1
Job: Milling off the surface course of a car park
Milling depth: T = 3 cm
Width: 25 m Length: 200 m
Total milled area: FF = 5,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 1.375 m2/h
Selection of the allowance factor
There are concrete pillars on the parking area, which must be driven
around. The factor 0.5 is therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 1,375 FP = 688 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 688 x 3 x 0.013 QV = 26.8 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 688 x 3 x 0.024 QT = 49.5 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 5,000 x 3 x 0.013 QGV = 195 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 5,000 x 3 x 0.024 QGT = 360 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 5,000/688 Z = 7.3 h, i.e. approx. 7–8 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
1.375 m2/h
Sample calculation 2
Job: Milling off the surface
and binder courses at an airport
Milling depth: T = 12 cm
Total milled area: FF = 8 x 1,500 m2 = 12,000 m2
Pavement: Asphalt, hard
Determination of the theoretical area output
from the diagram: FT = 460 m2/h
Selection of the allowance factor
The machine must be relocated several times, but no obstructions
are expected otherwise. The factor 0.5 is therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 460 FP = 230 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 230 x 12 x 0.013 QV = 35.9 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 230 x 12 x 0.024 QT = 66.2 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 12,000 x 12 x 0.013 QGV = 1,872 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 12,000 x 12 x 0.024 QGT = 3,456 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 12,000/230 Z = 52.2 h, i.e. approx. 52–53 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
460 m2/h
Cold milling machine 1300 DC
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output ......................................... 297 kW / 398 HP/404 PS
Milling width ................................................................................. 1.32 m
Milling depth ............................................................................ 0–30 cm
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000
Advance speedV (m/min)Theoretical area output FT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Hard asphalt
Soft asphalt
Most common working range
34 // 35
Sample calculation 1
Job: Milling off the wearing and binder courses
of an urban bypass
Milling depth: T = 12 cm
Total milled area: FF = 1,700 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 650 m2/h
Selection of the allowance factor
On account of the convex bays and traffic islands, a factor of 0.5
is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 650 FP = 325 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 325 x 12 x 0.013 QV = 50.7 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 325 x 12 x 0.024 QT = 93.6 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 1,700 x 12 x 0.013 QGV = 265.2 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 1,700 x 12 x 0.024 QGT = 489.6 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 1,700/325 Z = 5.2 h, i.e. 5–6 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
650 m2/h
Sample calculation 2
Job: Milling off the wearing course of an urban road
Milling depth: T = 4 cm
Total milled area: FF = 4,000 m2
Pavement: Asphalt, moderately hard or hard
Determination of the theoretical area output
from the diagram: FT = 1,600 m2/h
Selection of the allowance factor
On account of the dense traffic to be expected and the numerous
structures built in, a factor of 0.4 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.4 x 1,600 FP = 640 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 640 x 4 x 0.013 QV = 33.3 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 640 x 4 x 0.024 QT = 61.4 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 4,000 x 4 x 0.013 QGV = 208 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 4,000 x 4 x 0.024 QGT = 384 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 4,000/640 Z = 6.3 h, i.e. 6–7 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
1.600 m2/h
Cold milling machine 2000 DC
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 297 kW/398 HP/404 PS
Milling width ................................................................................. 2.01 m
Milling depth ............................................................................ 0–30 cm
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Hard asphalt
Soft asphalt
Most common working range
36 // 37
Sample calculation 1
Job: Milling off the wearing course of a three-lane feeder road
leading to the centre of a major city
Milling depth: T = 4 cm
Total milled area: FF = 6,000 m2
Pavement: Mastic asphalt, very hard
Determination of the theoretical area output
from the diagram: FT = 1,600 m2/h
Selection of the allowance factor
Convex bays and traffic islands will obstruct the work.
Therefore, a factor of 0.5 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 1,600 FP = 800 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 800 x 4 x 0.013 QV = 41.6 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 800 x 4 x 0.024 QT = 76.8 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 6,000 x 4 x 0.013 QGV = 312 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 6,000 x 4 x 0.024 QGT = 576 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 6,000/800 Z = 7.5 h, i.e. 7–8 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
1.600 m2/h
Sample calculation 2
Job: Milling off the bituminous courses
of a national trunk road
Milling depth: T = 24 cm
Total milled area: FF = 3,500 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 260 m2/h
Selection of the allowance factor
As the areas to be milled are continuous and the obstructions due to
traffic are relatively minor, a factor of 0.6 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 260 FP = 156 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 156 x 24 x 0.013 QV = 48.7 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 156 x 24 x 0.024 QT = 89.9 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 3,500 x 24 x 0.013 QGV = 1,092 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 3,500 x 24 x 0.024 QGT = 2,016 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 3,500/156 Z = 22.4 h, i.e. approx. 23 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
260 m2/h
Cold milling machine W 1500
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 340 kW/456 HP/462 PS
Milling width .................................................................................... 1.5 m
Milling depth ........................................................................ 0–32.0 cm
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
38 // 39
Sample calculation 1
Job: Milling off the surface and
binder courses at an inner-city crossroads
Milling depth: T = 12 cm
Total milled area: FF = 3,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 900 m2/h
Selection of the allowance factor
Due to the high traffic volume, a factor of 0.3 is chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.3 x 900 FP = 270 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 270 x 12 x 0.013 QV = 42.1 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 270 x 12 x 0.024 QT = 77.8 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 3,000 x 12 x 0.013 QGV = 468 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0,024
QGT = 3,000 x 12 x 0.024 QGT = 864 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 3,000/270 Z = 11.1 h, i.e. 11–12 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
900 m2/h
Sample calculation 2
Job: Milling out of a trench in a residential area
Milling depth: T = 30 cm
Width: 1,5 m Length: 600 m
Total milled area: FF = 900 m2
Pavement: Asphalt, soft
Determination of the theoretical area output
from the diagram: FT = 250 m2/h
Selection of the allowance factor
Due to the narrow road and the residential traffic to be expected,
the factor 0.4 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.4 x 250 FP = 100 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 100 x 30 x 0.013 QV = 39 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 100 x 30 x 0.024 QT = 72 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 900 x 30 x 0.013 QGV = 351 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 900 x 30 x 0.024 QGT = 648 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 900/100 Z = 9 h, i.e. approx. 9 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
250 m2/h
Cold milling machine W 1900
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 340 kW/456 HP/462 PS
Milling width .................................................................................... 2.0 m
Milling depth ........................................................................ 0–32.0 cm
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
40 // 41
Sample calculation 1
Job: Milling off the surface course in
the main road of a village
Milling depth: T = 8 cm
Total milled area: FF = 10,000 m2
Pavement: Asphalt, moderately hard or hard
Determination of the theoretical area output
from the diagram: FT = 1,320 m2/h
Selection of the allowance factor
There are road fittings and the through traffic will also obstruct the
construction work. The factor 0.4 is therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.4 x 1,320 FP = 528 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 528 x 8 x 0.013 QV = 54.9 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 528 x 8 x 0.024 QT = 101.4 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 10,000 x 8 x 0.013 QGV = 1,040 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 10,000 x 8 x 0.024 QGT = 1,920 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 10,000/528 Z = 18.9 h, i.e. approx. 19 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
1.320 m2/h
Sample calculation 2
Job: Milling off the surface and binder course
of three sections of a country road
Milling depth: T = 16 cm
Total milled area: FF = 8,000 + 7,000 + 5,000 m2 = 20,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 660 m2/h
Selection of the allowance factor
Little obstruction is to be expected. However, as the machine
must be relocated several times, the factor 0.5 is chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 660 FP = 330 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 330 x 16 x 0.013 QV = 68.6 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 330 x 16 x 0.024 QT = 126.7 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 20,000 x 16 x 0.013 QGV = 4,160 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 20,000 x 16 x 0.024 QGT = 7,680 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 20,000/330 Z = 60.6 h, i.e. approx. 61 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
660 m2/h
Hard asphalt
Soft asphalt
Most common working range
Cold milling machine W 2000
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 433 kW/581 HP/589 PS
Milling width .................................................................................... 2.0 m
Milling depth ............................................................................ 0–32 cm
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Theoretical performance values:
3432302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
0 500 1000 1500 2000 2500 3000 3500
Advance speedV (m/min)Theoretical area output FT (m2/h)
Milling depthT (cm)
42 // 43
Sample calculation 1
Job: Milling off the surface course of a motorway
Milling depth: T = 4 cm
Width: 4,0 m Length: 5,000 m
Total milled area: FF = 20,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 2,300 m2/h
Selection of the allowance factor
There are no obstacles to be expected on site and there
is sufficient transport capacity available. The factor 0.7 is
therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.7 x 2,300 FP = 1,610 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 1,610 x 4 x 0.013 QV = 83.7 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 1,610 x 4 x 0.024 QT = 154.6 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 20,000 x 4 x 0,013 QGV = 1,040 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 20,000 x 4 x 0.024 QGT = 1,920 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 20,000/1.610 Z = 12.4 h, i.e. approx. 13 working hours
Hard asphalt
Soft asphalt
Most common working range
3432302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
0 500 1000 1500 2000 2500 3000 3500
Advance speedV (m/min)Theoretical area output FT (m2/h)
Milling depthT (cm)
2.300 m2/h
Sample calculation 2
Job: Complete removal of the pavement on a secondary road
Milling depth: T = 30 cm
Width: 8 m Length: 1,500 m
Total milled area: FF = 12,000 m2
Pavement: Asphalt, soft
Determination of the theoretical area output
from the diagram: FT = 380 m2/h
Selection of the allowance factor
The road is heavily frequented, includes numerous bends and the
trucks must travel a long way to reach the site. The factor 0.5 is
therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 380 FP = 190 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 190 x 30 x 0.013 QV = 74.1 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 190 x 30 x 0.024 QT = 136.8 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 12,000 x 30 x 0.013 QGV = 4,680 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 12,000 x 30 x 0.024 QGT = 8,640 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 12,000/190 Z = 63.2 h, i.e. 63–64 working hours
Hard asphalt
Soft asphalt
Most common working range
3432302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
0 500 1000 1500 2000 2500 3000 3500
Advance speedV (m/min)Theoretical area output FT (m2/h)
Milling depthT (cm)
380 m2/h
Cold milling machine 2100 DC
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 448 kW/601 HP/610 PS
Milling width .................................................................................... 2.0 m
Milling depth ............................................................................ 0–30 cm
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Theoretical performance values:Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
44 // 45
Sample calculation 1
Job: Milling off the mastic asphalt wearing course
of a section of motorway
Milling depth: T = 5 cm
Total milled area: FF = 30,000 m2
Pavement: Asphalt, moderately hard or hard
Determination of the theoretical area output
from the diagram: FT = 2,000 m2/h
Selection of the allowance factor
Although the areas to be milled are contiguous and no obstructions
are anticipated, the waiting times for trucks must be taken into
account. Therefore, a factor of 0.6 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 2,000 FP = 1,200 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 1,200 x 5 x 0.013 QV = 78 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 1,200 x 5 x 0.024 QT = 144 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 30,000 x 5 x 0.013 QGV = 1,950 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 30,000 x 5 x 0.024 QGT = 3,600 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 30,000/1,200 Z = 25 h, i.e. approx. 25 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
2.000 m2/h
Sample calculation 2
Job: Removal of the complete structure
of bituminous courses of a country road
Milling depth: T = 30 cm
Total milled area: FF = 10,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 300 m2/h
Selection of the allowance factor
On account of the high volume to be reclaimed, the difficult condi-
tions for transport of the reclaimed material and the delays while
waiting for trucks, a factor of 0.5 is selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 300 FP = 150 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 150 x 30 x 0.013 QV = 58.5 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 150 x 30 x 0.024 QT = 108 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 10,000 x 30 x 0.013 QGV = 3,900 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 10,000 x 30 x 0.024 QGT = 7,200 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 10,000/150 Z = 66.7 h, i.e. approx. 67 working hours
Milling depthT (cm)32302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
300 m2/h
Cold milling machine W 2100
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 522 kW/700 HP/710 PS
Milling width .................................................................................... 2.0 m
Milling depth ........................................................................ 0–32.0 cm
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Theoretical performance values:
3432302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
Milling depthT (cm)
46 // 47
Sample calculation 1
Job: Milling off the surface course of the right
hand lane of a motorway
Width: 4.0 m Length: 10,000 m
Milling depth: T = 4 cm
Total milled area: FF = 40,000 m2
Pavement: Asphalt, hard
Determination of the theoretical area output
from the diagram: FT = 2,340 m2/h
Selection of the allowance factor
No obstructions are to be expected on the site, but problems with the
transport capacity may arise as the materials depot is relatively far
away. The factor 0.5 is therefore selected.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.5 x 2,340 FP = 1,170 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 1,170 x 4 x 0.013 QV = 60.8 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 1,170 x 4 x 0.024 QT = 112.3 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 40,000 x 4 x 0.013 QGV = 2,080 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 40,000 x 4 x 0.024 QGT = 3,840 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 40,000/1,170 Z = 34.2 h, i.e. approx. 34–35 working hours
3432302826242220181614121086420
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0 500 1000 1500 2000 2500 3000
Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
Milling depthT (cm)
2.340 m2/h
Sample calculation 2
Job: Complete removal of the
structure of a motorway
Milling depth: T = 30 cm
Total milled area: FF = 30,000 m2
Pavement: Asphalt, hard
Determination of the theoretical area output
from the diagram: FT = 280 m2/h
Selection of the allowance factor
The entire carriageway on one side of the motorway is blocked and
an undisrupted progress of work can be expected. The factor 0.6 is
therefore chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 280 FP = 168 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 168 x 30 x 0.013 QV = 65.5 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 168 x 30 x 0.024 QT = 121 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 30,000 x 30 x 0.013 QGV = 11,700 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 30,000 x 30 x 0.024 QGT = 21,600 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 30,000/168 Z = 178.6 h, i.e. approx. 175–180 working hours
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Advance speedV (m/min)Theoretical area output FT (m2/h)
Hard asphalt
Soft asphalt
Most common working range
Milling depthT (cm)
280 m2/h
Hard asphalt
Soft asphalt
Most common working range
Cold milling machine W 2200
Calculation of the practical area output FP:
Calculation of the practical reclaimed volume QV:
Calculation of the practical reclaimed quantity QT:
Calculation of the total reclaimed volume for the job QGV:
Calculation of the total reclaimed quantity for the job QGT:
Calculation of the working time required for the job Z:
Technical data:
Engine output .......................................... 671 kW/900 HP/913 PS
Milling width .................................................................................... 2.2 m
Milling depth ............................................................................ 0–35 cm
FP (m2/h) = A x FT
QV (m3/h) = FP x T x 0.013
QT (t /h) = FP x T x 0.024
QGV (m3) = FF x T x 0.013
QGT (t) = FF x T x 0.024
Z (h) = FF/FP
Legend:
FT (m2/h) = Theoretical area output in m2/h
FP (m2/h) = Practical area output in m2/h
FF (m2) = Milling area in m2
A = Allowance factor
Milling in built-up areas: A = 0.3 to 0.5
Milling in open country: A = 0.5 to 0.7
Z (h) = Working time in h
T (cm) = Selected milling depth in cm
QV (m3/h) = Practical reclaimed volume in m3/h
QT (t/h) = Practical reclaimed quantity in tonnes/h
QGV (m3) = Total reclaimed volume for the job in m3
QGT (t) = Total reclaimed quantity for the job in
tonnes
Theoretical performance values:
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Advance speedV (m/min)Theoretical area outputFT (m2/h)
Milling depthT (cm)
48 // 49
Sample calculation 1
Job: Complete removal of the pavement structure
on a motorway
Milling depth: T = 30 cm
Width: 4 m Length: 5,000 m
Total milled area: FF = 20,000 m2
Pavement: Asphalt, moderately hard
Determination of the theoretical area output
from the diagram: FT = 560 m2/h
Selection of the allowance factor
Site traffic is not expected to cause much interference.
There are sufficcient trucks available. The factor 0.6 is therefore
chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.6 x 560 FP = 336 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 336 x 30 x 0.013 QV = 131.0 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 336 x 30 x 0.024 QT = 241.9 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 20,000 x 30 x 0.013 QGV = 7,800 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 20,000 x 30 x 0.024 QGT = 14,400 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 20,000/336 Z = 59.5 h, i.e. approx. 60 working hours
Hard asphalt
Soft asphalt
Most common working range
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0 500 1000 1500 2000 2500 3000 3500 4000 4500
Advance speedV (m/min)Theoretical area outputFT (m2/h)
Milling depthT (cm)
560 m2/h
Sample calculation 2
Job: Milling off an airport runway
Milling depth: T = 32 cm
Width: 50 m Length: 2,000 m
Total milled area: FF = 100,000 m2
Pavement: Asphalt, moderately hard or hard
Determination of the theoretical area output
from the diagram: FT = 450 m2/h
Selection of the allowance factor
The area to be milled forms a continuous surface and nothing
is expected to obstruct the work. The factor 0.7 is therefore
chosen.
Calculation of the practical area output FP (m2/h):
FP = A x FT
FP = 0.7 x 450 FP = 315 m2/h
Calculation of the practical reclaimed volume QV (m3/h):
QV = FP x T x 0.013
QV = 315 x 32 x 0.013 QV = 131.0 m3/h
Calculation of the practical reclaimed quantity QT (t /h):
QT = FP x T x 0.024
QT = 315 x 32 x 0.024 QT = 241.9 t/h
Calculation of the total reclaimed volume QGV (m3):
QGV = FF x T x 0.013
QGV = 100,000 x 32 x 0.013 QGV = 41,600 m3
Calculation of the total reclaimed quantity QGT (t):
QGT = FF x T x 0.024
QGT = 100,000 x 32 x 0.024 QGT = 76,800 t
Calculation of the working time required Z (h):
Z = FF / FP
Z = 100,000/315 Z = 317.5 h, i.e. approx. 318 working hours
Hard asphalt
Soft asphalt
Most common working range
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Advance speedV (m/min)Theoretical area outputFT (m2/h)
Milling depthT (cm)
450 m2/h
50 // 51
Illustrations are without obligation. Subject to technical changes. Performance data depend on operational conditions. No. 01-50 EN-07/06 © by Wirtgen GmbH 2006. Printed in Germany
Wirtgen GmbHHohner Straße 2 · 53578 Windhagen · Germany
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