Effect of bitumen type on the shear strength of the interface

Asphaltic concrete has been used as waterproofing core in embankment dams, granular materials are used around the asphaltic concrete as filter, which makes a complicated behavior in the interface and needs to be researched by experiments and modeling. This paper describes experimental work and the results of investigating the mechanical behavior of the interface between aggregates and asphaltic concrete. Small scale shear strength test has been used in this study, in which the shear surface is considered as the interface. The effect of bitumen penetration grade on the shear strength parameters at different levels of normal stresses and a constant shear rate have been studied. The results show that the shear strength parameters have changed in asphalt concrete.

Keywords:

Asphalt concrete , Shear strength , Mechanical behaviour , Bitumen type