Fiber asphalt mixture is a new material for long-term asphalt pavement.Due to the significant impact of fiber types and dosages on the performance of asphalt mixture,this paper will use different fiber types(basalt fiber,glass fiber,polyester fiber)and contents(0.1％,0.2％,0.3％,0.4％,0.5％)as the research object,and first use Marshall test design method to test the raw material performance of AC-13 asphalt mixture.Afterwards,rut test,low temperature trabecular bending test,immersion Marshall test and freeze-thaw splitting test were conducted to study the road performance of fiber asphalt mixture.The results show that the optimal dosage of basalt fiber,glass fiber,and polyester fiber is 0.4％,0.3％,and 0.3％,respectively.Under the optimal dosage,the reinforcement effect of basalt fiber is the best,with a dynamic stability increase of 30.0％,a penetration strength increase of 14.0％,a maximum bending tensile strain increase of 20.1％,a residual stability increase of 1.9％after immersion,and a freeze-thaw splitting strength ratio increase of 1.7％.
fiber asphalt mixturefiber typefiber dosageraw material performanceroad performance
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