SBS与胶粉复合改性沥青在改善路面高温性能中的应用

PPLICATION OF SBS AND RUBBER POWDER COMPOSITE MODIFIED ASPHALT IN IMPROVING HIGH-TEMPERATURE PERFORMANCE OF PAVEMENT

由于道路上车辆数量的增加,二手车轮胎的数量也呈指数级增长。将轮胎制成胶粉,加入沥青中,形成沥青橡胶作为沥青路面的一种沥青结合料,是利用废旧轮胎的有效途径。为了评价复合改性沥青材料的高温性能改善作用,选择了3种不同的沥青结合料和2种不同的混合料类型,并进行了相关试验。最后,从50~70℃胶粉和SBS(苯乙烯嵌段共聚物)复合改性沥青的还原率最小。研究表明,在高温季节,胶粉和SBS的复合改性沥青是沥青路面表面施工的最佳选择。本研究为沥青橡胶在道路建设领域提供了借鉴,也实现了废物的循环利用和环境保护。

Due to the increase in the number of vehicles on the road,the amount of used vehicle tires has also increased exponentially.Making tires into rubber powder and adding them into asphalt,which forms asphalt rubber as a kind of asphalt binder of asphalt pavement surface,is an effective way of using waste tires.In order to evaluate the high-temperature performance improvement of composite-modified asphalt material,three different asphalt binders and two different asphalt mixture types were selected and the related tests were conducted.Finally,CR/SBS composite-modified asphalt had the smallest reduction rate from 50℃to 70℃.This study identifies that compound action of rubber powder and SBS is an optimal choice for asphalt pavement surface in high-temperature season.It provides a wider range of applications for asphalt rubber in the road construction field,which also realizes waste cyclic utilization and environmental protection.