Study on Preparation and Performance of Polyurethane-Epoxy Resin Modified Asphalt Ultra-thin Friction Course
To improve the service performance of asphalt concrete ultra-thin friction course,the polyurethane-modified epoxy resin(PU-EP)was produced by grafting the polyurethane flexible chain segment into the molecular structure of epoxy resins,and the high-performance two-component PU-EP modified asphalt was prepared using raw materials of PU-EP,curing agent,compatibilizer,and matrix asphalt.This paper compared and analyzed the road performance of three types of SMA-10 ultra-thin friction courses,UFCPU-EP,UFCEP,and UFCSBS,with PU-EP modified asphalt,epoxy resin asphalt,and SBS-modified asphalt as binders,respectively.The test results indicated that the UFCPU-Ep showed the optimum high-temperature stability,water stability,and cohesiveness.However,its fatigue resistance and low-temperature cracking resistance were slightly lower than those of UFCSBS,but much higher than those of UFCEP.Overall,the PU-EP modified asphalt ultra-thin friction course prepared in this paper has excellent road performance.
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