7/25/2019 Marshal Stability Test

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MARSHAL STABILITY APPARATUSGROUP MEMBERS : ZEESHAN ZAFAR L12- 5730, MAISAM HUSSAIN L12- 5716,

AENAN BASHIR L12- 5715, TAIMUR SALIK L12- 5727, USMAN L12- 5731

DEPARTMENT OF I!IL ENGINEERING, FAST "NUES#

Bituminous mixes (some times called asphalt mixes) are

used in the surface layer of road and airfield pavements.

The mix is composed usually of aggregate and asphalt

cements. Some types of bituminous mixes are also used in

base coarse. The design of asphalt paving mix, as with the

design of other engineering materials is largely a matter of

selecting and proportioning constituent materials to obtain

the desired properties in the finished pavement structure.

The desirable properties of Asphalt mixes are

!."esistance to permanent deformation.

#.The mix should not crac$ when sub%ected to repeated

loads over a period of time.

&."esistance to low temperature crac$ing.

'.urability

."esistance to moisture*induced damage.

+.S$id resistance.. -or$ability

. /ow noise and good drainage properties

0arshall stability and 1veem stabilometer tests are

largely used for the routine testing. 2riteria for the

suitable mix design have been specified by the Asphalt

3nstitute

INTRODUCTION

The apparatus consists of !. A loading unit motori4ed, capacity 555$gf

with two telescopic pillars and an ad%ustable

cross head. /imit switches are fitted inside to

control upward or downward movement of the

pillars. 6n*off reversing switch and indicator

lamps are on the front side while a hand wheel

to manually move the pillars is on the right.

The load frame has fixed speed of .5cm per

minute. 6perated on #&5 7olts A.2.

#. ! 8o. 2ompaction pedal with specimen mold

holder.

&. # 8os. 2ompaction "ammers, '.$g weight

and free fall '.cm.

'. ! 8o. Brea$ing head assembly with provision

to fix flowmeter.. & 8os. Specimen mold !5.!+cm 3.. x .+cm

high with base plate and extension collar.

+. ! 8o. 9it for specimen extraction, consists of

one each load transfer bar, steel ball, specimen

extracting plate.

Accessories

a) 3ntegral type :roving "ing capacity &555 $gs.

b) A dial gauge 5.5! x #mm

c) ;niversal -ater Bath S.S. with false bottom

and pyramid shaped lid to accommodates &

8os. 0arshall specimen

d) Thermometer 5 * #5