废旧塑料改性沥青混合料路用性能研究

Research on Pavement Performance of Waste Plastic Modified Asphalt Mixture

通过高温车辙试验、冻融劈裂试验、低温弯曲试验及沥青的三大指标测试对不同掺量下废旧塑料改性沥青混合料的路用性能及沥青的各项性能进行了研究,探究了废旧塑料改性剂掺量对改性沥青混合料性能的影响。研究结果表明:废旧塑料改性沥青可以提升沥青混合料的各项路用性能,但随着废旧塑料改性剂掺量的增加,改性沥青的改性效果逐渐降低。因此,改性沥青中废旧塑料改性剂的最佳掺量应为5.5%左右。

Through the high temperature rut test,the freezing-thaw splitting test,the cold bending test and the asphalt three indicators test,the pavement performance and other properties of waste plastic modified asphalt mixture with different modifier content were studied.The influence of waste plastic modifier content on the modified asphalt mixture was studied.The results showed that,the waste plastic modified asphalt can improve the pavement performance of the asphalt mixture.However,with the increase of the content of waste plastic modifier,the modification effect of modified asphalt decreased gradually.Therefore,the optimal content of waste plastic modifier in modified asphalt should be about 5.5%.