Subject : Transportation Engineering 2

Topic : Pavement materials

Difficulty : Low

Ans : Marshal Stability test is conducted on compacted cylindrical specimens of bituminous mix of diameter 101.6 mm & thickness 63.5 mm . The load is applied perpendicular to the axis of the cylindrical specimens through a testing head consisting of a pair of cylindrical segments at a constant rate of deformation of 51 mm per minute at the standard test temperature of 60 0c The Marshall stability of the bituminous mix specimen is defined as a maximum load carried in kg at the standard test temperature of 60 c when load is applied under specified test condition. The flow value is the total deformation that Marshall test specimen under goes at the maximum load expressed in mm units. The Marshall stability value of compacted specimen of bituminous mix indicates its resistance to deformations under applied incremental load and the flow value indicates the extent of deformation it undergoes due to loading or its flexibility.