Test on Evaluation Index of Deformation Performance for Polyester Fiber Reinforced Asphalt Concrete

In order to study evaluation index of deformation performance for polyester fiber reinforced asphalt concrete, this paper started from five different fiber contents (0, 0.15%, 0.20%, 0.25%, 0.30% of asphalt mixture quality), determined optimum asphalt content of asphalt mixture by marshall test and measured split strength of asphalt concrete by split test. The results showed that it was contradictory in evaluating deformation performance of fiber reinforced asphalt concrete by breaking strength and stiffness modulus. Therefore, toughness index was proposed to supplement evaluation index of deformation performance for fiber reinforced asphalt concrete. This paper summarized test results and put forward that optimum fiber content was 0.25%. The testing road showed that toughness index perfectly supplement the evaluation index of deformation performance for polyester fiber reinforced asphalt concrete, and polyester fiber can improve cryogenic crack resistance, rut resistance and fatigue resistance.