Study on Road Performance of Hot Recycled Asphalt Mixture Modified by TLA and Polyester Fiber
In order to improve the road performance and durability of hot recycled asphalt mixture,TLA and polyester fiber are first used for composite design,and then based on Marshall,high-temperature rutting,low-temperature bending,soaking Marshall,freezethaw splitting,two-point bending and soaking APA tests,the high-temperature stability,low-temperature crack resistance,water stability and fatigue endurance of TLA and polyester fiber composite modified hot recycled asphalt mixture were comprehensively investigated.The results show that both TLA and polyester fiber can improve the high-temperature stability,low-temperature crack resistance and water stability of hot recycled asphalt mixture,and the improvement effect of TLA is relatively obvious;The road performance of the hot recycled asphalt mixture modified by TLA and polyester fiber has been significantly improved,and it can be applied to the construction of asphalt pavement in the severe cold in the north of China or the high temperature,humid and rainy areas in the south;TLA can effectively improve the stiffness modulus and fatigue life of hot recycled asphalt mixture,and the improvement effect is more obvious after reasonable mixing of polyester fiber,which meets the regulations and requirements of high modulus asphalt mixture;The road performance and durability of hot recycled asphalt mixture can be comprehensively improved by using a reasonable proportion of TLA and polyester fiber.
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