废旧橡塑合金改性剂制备及其改性基质沥青的机理  

Preparation of Reclaimed Rubber-Plastic Alloying Agent and Its Modification Mechanism on Matrix Asphalt

作　　者：任瑞波[1] 耿立涛[1] 徐强[1] 王飞[1] 

机构地区：[1]山东建筑大学道路工程实验室,山东济南250101

出　　处：《建筑材料学报》2016年第3期528-533,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51278288);中国博士后科学基金资助项目(2013M542412);住房和城乡建设部科技计划项目(2014-K5-008)

摘　　要：基于废旧橡胶粉和废旧塑料的组分分析,制备了不同橡塑比(质量比)的废旧橡塑合金改性剂,并研究了废旧橡胶粉和废旧塑料的共混机理;利用优选的废旧橡塑合金改性剂制备了废旧橡塑改性沥青,分析了废旧橡塑合金改性剂对基质沥青的改性机理,测试了废旧橡塑改性沥青的技术性能和存储稳定性.结果表明:当橡塑比为7∶3时,废旧橡胶粉和废旧塑料具有良好的相容性;废旧橡胶与废旧塑料的共混过程及废旧橡塑合金改性剂对基质沥青的改性过程均以物理作用为主;废旧橡塑合金改性剂与基质沥青具有良好的相容性,废旧橡塑改性沥青具有良好的技术性能和存储稳定性.废旧橡塑合金改性剂明显改善了基质沥青的路用性能,具有应用潜力.On the basis of the component analysis of reclaimed rubber and reclaimed plastic,the reclaimed rubber-plastic alloying agents（RPAAs）with different mixing ratios（by mass）of reclaimed rubber and reclaimed plastic were prepared and the blend mechanism of reclaimed rubber and reclaimed plastic was studied.Then reclaimed rubber-plastic modified asphalt（RPMA）was prepared with the optimized RPAA,and the modification mechanism of RPAA on matrix asphalt was analyzed.Technical performance and storage stability of RPMA were also evaluated.The research shows that reclaimed rubber and reclaimed plastic exhibit good compatibility at the mixing ratio of 7∶3.The physical action is the main form during blend process of reclaimed rubber and reclaimed plastic and modification process of RPAA on matrix asphalt.RPAA shows good compatibility with matrix asphalt.RPMA shows good technical performance and storage stability.RPAA can greatly improve the road performance of matrix asphalt,and shows application potential in road engineering.

关 键 词：废旧橡塑合金改性剂 红外分析 差热分析 组分分析 原子力显微镜分析 PG分级试验 

分 类 号：U414.1[交通运输工程—道路与铁道工程]