COMPARATIVESTUDYOFCONVENTIONALAND STYRENEBUTADIENE RUBBER MODIFIED BITUMINOUS MIX

This study is carried out in order to evaluate the effects of addition of various percentages ofstyrene butadiene rubber(SBR) on the properties of bitumen binder. SBR was added in the mix at 2.5%,3.5%,4.5%,5.5% and 6% by weight of bitumen were blended with VG 40 grade of bitumen. The conventional and SBR modified mix were subjected to various tests like marshalstability and flow, penetration test,softening point test. The tests depicted that the modified bituminous mix is superior to the conventional mix. The addition of SBR increased the stability of the bituminous mix and is environmental affable.