Study on Reasonable Filler Asphalt Ratio of Polyester Fiber-reinforced Asphalt Mixture

The filler asphalt ratio is an important index of asphalt mixture's design.The asphalt mortar's high temperature performance was evaluated according to cone penetration test,and the low temperature performance was evaluated according to bending test,which were created by the authors.The test results show that,the high temperature performance of the fiber asphalt mortar is better than that of the normal asphalt mortar with the same filler asphalt ratio,which means that the former's cone penetration is smaller than the latter's,and the former's anti-shearing strength is bigger than the latter's,the suggested fiber asphalt mortar's filler asphalt ratio is not smaller than 0.8;for the low temperature performance,the suggested filler asphalt ratio is not larger than 1.5,otherwise mortar's stiffness modulus increases markedly.The reasonable range of fiber-reinforced asphalt mortar is 0.8～1.5.The mixture's low temperature performance is better when the filler asphalt ratio is 0.73～1.59.According to the test results,the reasonable range of polyester fiber-reinforced asphalt mixture is 0.95～1.59,which should be adjusted according to the climate and traffic.