TMR Pavement Design Supplement - AAPA Q · TMR Pavement Design Supplement AAPA Bituminous Surfacing...
Transcript of TMR Pavement Design Supplement - AAPA Q · TMR Pavement Design Supplement AAPA Bituminous Surfacing...
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TMR Pavement Design Supplement AAPA Bituminous Surfacing - Principles & Practice course: Fundamentals of flexible pavement design
Michael Pickering, Director (Pavements, Research and Innovation) | 21 August 2014
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We connect Queenslanders…
PDS and harmonised asphalt spec | 29 May 2014
• We get people and industry moving
• We plan, we invest
• We deliver, we manage
• We regulate
• We help, we educate
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We deliver, we manage
PDS and harmonised asphalt spec | 29 May 2014
We plan, we invest
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Outline
• Drivers • Using it • Development and consultation • Key content • Typical outcomes (2013 versus 2009)
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Transport and Main Roads’ Pavement Design Supplement (PDS)
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1922
Source: MR Board First Annual Report, 1922
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Drivers for review
Flexibility Alignment with Austroads
Supplement Linkages
Value for money
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Overall style has changed – less prescriptive
• No gold plating • Value-for-money • ‘Re-engineer the regions’.
Transport and Main Roads environment
• Ensuring affordable fit-for purpose solutions by reviewing our current processes and standards
• Empowering our people to develop innovative solutions.
Infrastructure Management & Delivery (IMD)
priorities
• From regions was that the previous Pavement Design Manual was too prescriptive.
Feedback
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How to use the PDS
Read both together
Transport and Main Roads adopts the national standards of Austroads, as per AGPT02 (2012).
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How to use the PDS
AGPT02
PDS
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How to use the PDS
Additional sections, tables, figures, equations
Start with prefix Q
Examples in the PDS
• Section Q2.4 Shoulders with a lower structural standard • Table Q2.1 Guide to the selection of pavement types • Equation Q6.1 (adjusting moduli for WMAPT).
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How to use the PDS
• • • • • • • •
• • •
AGPT02
PDS
Includes a range of strategies
Includes additional strategies PDS | 21 August 2014
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Development process
Transport and Main Roads Value-for-money review
ARRB Stakeholders
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Key content
Some of the major
changes since 2009
Background and
technical basis
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Pavement design period
Road Category Proposed Design Period (Years)
Motorways, busways and arterials
30
Sub-arterials and Priority One Roads1
20
All other roads 10 1 State Controlled Priority Road Network Investment Guidelines (June, 2011)
AADT (two directions)
Adopted Design Period (Years)
≥ 30,000 30
< 30,000 20
Initial proposal
0
10
20
30
40
50
60
Construction Cost Maintenance Cost Salvage Value Total Whole-of-lifeCost
Dis
coun
ted
$/m
2
20 year design period
10 year design periodConsultation WOLC
Adopted
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Project reliability
Road Category Minimum Reliability
(%) Motorways, highways and main roads with lane AADT
> 2000 97.5
Highways and main roads with lane AADT > 500 and
≤ 2000 95
Minor roads with lane AADT ≤ 500 90 Road Category
Typical Reliability
(%)
Freeways (Motorways) 95
All other roads (includes highways and main roads)
90
2009 Manual
2013 PDS
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Section 2.2 Pavement types
Previously PDM had minimum pavement
standards
PDS has a guide to selection, to be used in conjunction with
local experience, and project-specific requirements
PDM = Pavement Design Manual (TMR 2009) PDS = Pavement Design Supplement (TMR 2013)
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Common pavement types
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Example
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Surfacing selection
Part 3: Pavement Surfacings of the Austroads Guide to Pavement Technology (Austroads, 2009)
Update of Double / Double Design for Austroads Sprayed Seal Method, AP-T236-13 (Austroads, 2013)
Update of the Austroads Sprayed Seal Design Method, AP-T68-06 (Austroads, 2006)
Plus project-specific requirements
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Subgrade - Moisture conditions
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Section 6.2 Selecting unbound materials
Table Q6.1 – Typical application of standard materials (MRTS05 Type) in sealed unbound granular pavements
Average daily traffic in design lane in year of opening (ESA)
Typical Material Type 2, 3
Median Annual Rainfall (mm)
≥ 800 mm / year ≥ 500 mm/year to < 800 mm/year < 500 mm/year
Base
≥ 1000 to < 3000 HSG1 HSG1 HSG1
≥ 100 to < 1000 2.1 or 1.1 2.1 or 3.1 3.1
≥ 10 to < 100 2.1 2.1 or 3.1 3.1
< 10 2.2 2.2 or 3.2 3.2
Upper Subbase
≥ 1000 to < 3000 1.2 or 2.3 2.3 or 2.4 2.3, 2.4, 3.3 or 3.4
≥ 100 to < 1000 2.3 2.3, 2.4, 3.3 or 3.4 3.3 or 3.4
< 100 2.4 2.4 or 3.4 3.4
Lower Subbase
All 2.5 2.5 or 3.5 3.5
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Section 6.3 Modified materials
• Notes differences between AGPT02 definition and Transport and Main Roads usage
• Provides general guidance and caters for local region requirements
• Reference to Transport and Main Roads report for further guidance on design methodology and project-specific technical standard.
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Section 8 Flexible pavements
Plant-mix foamed bitumen
• Refer to Transport and Main Roads Pavement Rehab Manual
Lime stabilised subgrade
• Refer to Transport and Main Roads Technical Note 74
Post cracked life of cemented subbase can be included
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Table Q6.7 Selection of DG binder
Table Q6.7 – Guide to the selection of dense graded asphalt binders
Application Traffic Conditions (average daily ESA in design lane in
year of opening) Typical Binders Free Flowing High Shear1
Surfacing
< 1000 < 300 C320 2, 3
1000 to < 3000 300 to < 1000 A5S 2
≥ 3000 ≥ 1000 A5S 4
Intermediate course
< 1000 < 300 C320 2, 3
1000 to < 3000 300 to < 1000 A5S 5
≥ 3000 ≥ 1000 A5S 4
Base course All < 3000 C320, C600 2
All ≥ 3000 6 C600 2
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3.7 Waterproofing seals
DG7, DG10
92.0%
SM10, DG14, DG20, DG28
93.0%
SM14
94.0%
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PDS 2013 Presumptive modulus
Mix Type Binder Binder Volume
Asphalt modulus at heavy vehicle operation speed (MPa)
10 km/h 30 km/h 50km/h 80 km/h OG10/14 A5S N/A 800 800 800 800
SM14 A5S 13 1000* (600)
1000* (900) 1100 1300
DG10 C320 11.5 1000* (900) 1300 1600 1900
DG10 A5S 11.5 1000* (600)
1000* (800) 1000 1200
DG14 C320 11 1100 1700 2000 2400 DG14 C600 11 1400 2000 2400 2900
DG14/HP/HS A5S 11 1000* (700) 1000 1300 1500
DG20 C320 10.5 1200 1800 2200 2600 DG20/HM C600 10.5 1500 2200 2600 3100
DG28 C320 10 1200 1800 2200 2600 DG28 C600 10 1500 2200 2600 3100
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Cost savings – Motorway example
AADT 80,000
PDM 2009
PDS 2013
Design life 40 years
Design life 30 years
Project reliability 97.5%
Project reliability
95%
HV 12%
DESA 3.28E+08
DESA 1.93E+08
CBR 5%
Subgrade treatment?
No
Subgrade treatment?
No
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Cost savings – Motorway example using full depth asphalt
OG 14 S4.5S
DG 14 HS
Surfacing Seal
Intermediate course
Improved Layer (Working Platform)
40 mm Yes
50 mm
PDM 2009 40 mm
Yes 50 mm
PDS 2013
Prime & Seal
DG20HM
Base course
375 mm
310 mm
Type 2.3 150 mm (cemented)
150 mm (cemented/ unbound)
Prime + C170 Yes Yes / No
$280k Asphalt
(1 km)
$60k Seals
(potential)
$340k Saving (potential)
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Fact sheet
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Project specific requirements
• Define project-specific requirements. Project brief
• More detailed brief for some contract types, e.g. D and C, developments.
Contract type
• The brief should detail how design exceptions/departures are to be considered.
Design exceptions/ departures
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Design exceptions/departures and innovations
Open for consideration
Risks and benefits
Risk management
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Innovation Assessment Checklist
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Austroads TMR/ARRB
Industry Your feedback
What next?
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Pavements Research and Innovation
• Technical specifications including unbound granular materials, bitumen, sealing, asphalt and concrete
• Project specific technical specifications such as SMA, cement modified base, high standard granular and subgrade
• Guide notes, test methods and approved product lists • Pavement Design Supplement • Specialist technical advice • Peer review • Innovation assessment • TMR/ARRB research • Austroads • Registration of asphalt suppliers and mixes • Technical training.
What we do
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Pavements Research and Innovation
• Overarching and general enquiries • Austroads Pavements Task Force.
Mike Pickering, Director (Pavements, Research and
Innovation), 3066 7741
• Pavement design • Concrete pavements • Cement modified pavements.
Peter Bryant, Principal Engineer (Pavement Design), 3066 7743
• Unbound pavement materials • Recycled materials • Heavy vehicles.
Narelle Dobson, Principal Engineer (Pavements and Materials Development), 3066 7742
• Asphalt • Seals • Surfacings.
Jason Jones, Principal Engineer (Asphalt and Surfacings),
3066 7726
• Asphalt supplier and mix design registration • Bitumen and binders • Pre-coating and anti-stripping (adhesion) agents.
Barry Rule, Principal Advisor (Materials Testing), 3066 7719
• Mechanical engineering • Austroads Technology Program Manager.
John Spathonis, Principal Manager (Research and Development),
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Thank you