Abstract

This paper present a part of research conducted to investigate the deformation behaviour of the well graded bituminous concrete mixture using dynamic creep test for the unmodified control mix and Polyethylene modified bituminous mix. Control mix was prepared with 80/100 Pen bitumen while polyethylene modified mix was prepared using low density polyethylene (LLDPE) as modifier, blended with 80/100 Pen bitumen. The concentration of polymer in the blend was kept at 1%, 2% and 3% by weight of bitumen content. Marshall Specimens prepared at optimum bitumen content were used to investigate the creep stiffness of both modified and control mixes. It was found that 3% LLDPE modified bituminous mixes offer better results in comparison to control and 1% & 2% LLDPE modified mixed samples when they were investigated in terms of mixture stiffness obtained at 40̊C by dynamic creep test. The rut depth estimation as observed by wheel tracking test results also follows the same trend as observed by dynamic creep results.

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