Abstract: In order to further improve waste crumb rubber asphalt pavement performance，this paper made waste plastics ( PP，PVC) into particles or powder，then added to the asphalt together with the crumb rubber，made into the waste plasyiccrumb rubber composite modified asphalt through physical and chemical processing． After testing the two compound modified asphalt and their mixture performance indicators，it came to the conclusion that PP-crumb rubber composite modified asphalt not only significantly reduces the high temperature viscosity of asphalt binder，but also improves the mixture pavement performance to some extent，that is，to bring the convenience of construction without affecting road performance． In contrast， the road performance of PP-crumb rubber composite modified asphalt mixture is superior to the traditional rubber asphalt; the PVC-crumb rubber composite modified asphalt mixture is relatively weaker．

Key words: road engineering, rubber asphalt, waste plastics, crumb rubber, modified asphalt, road performance

摘要： 为进一步提高废轮胎橡胶沥青混合料路用性能，将废塑料( PP、PVC) 制成颗粒或粉末与废轮胎胶粉一起添加 到基质沥青中，通过物理和化学等加工工艺制成废塑胶粉复合改性沥青。对两种复合改性沥青的各项性能指标以 及混合料路用性能进行试验，结果表明: 废聚丙烯-橡胶粉复合改性沥青不仅大幅度降低了沥青胶结料的高温粘度， 同时混合料的路用性能还得到了一定程度地提高，即给施工带来了便利又不影响路用性能。相比之下，PP-橡胶粉 复合改性沥青混合料路用性能优于传统废轮胎胶粉改性沥青，而PVC-橡胶粉复合改性沥青混合料路用性能相对较 弱。

关键词: 道路工程, 橡胶沥青, 废塑料, 橡胶粉, 复合改性沥青, 路用性能