Analysis on the Performance of Basalt Fiber High Modulus Asphalt Mixture
In order to improve the construction quality of asphalt pavement and reduce the damage of pavement,the G45 Daqing-Guangzhou Expressway is taken as the research object,this paper expounds the selection of raw materials for asphalt pavement,such as base asphalt,aggregates,fillers,fibers and additives,etc.,the mixture ratio design of basalt fiber high modulus asphalt mixture is ana-lyzed from the aspects of aggregate gradation and optimum asphalt-aggregate ratio.The high temperature stability and low temperature cracking resistance of high modulus asphalt mixture under different working conditions are tested by rutting test and bending test,the dynamic stability,flexural tensile strength and flexural tensile strain increased at first and then decreased.When the content of basalt fi-ber is more than0.4%,the performance of asphalt mixture tends to decline,so the optimal content of basalt fiber is 0.4%,marshall immersion test was carried out for asphalt mixture with 0.3%high modulus agent and 0.4%basalt.The test results showed that the re-sidual stability of each specimen was greater than 85%,which met the requirements of the code.
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