橡胶粉纤维沥青混合料高温性能及施工和易性  

High Temperature Stability and Workability of Crumb Rubber-modified and Fibers-reinforced Asphalt Mixture

作　　者：王笑风[1] 苏青山[2] 王振军[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安710064 [2]湖北省天门市公路管理局,天门431700

出　　处：《武汉理工大学学报（交通科学与工程版）》2006年第5期846-849,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：西部交通建设科技项目(批准号:200231800030)

摘　　要：通过比较几种试验方案,从不同的理论角度分析纤维加筋和橡胶粉对混合料的改性机理.试验结果表明:同时采用纤维加筋和干拌橡胶粉技术,可以综合二者优势获得具有良好高温稳定性的多碎石沥青混合料;采用将橡胶粉直接投入搅拌锅的混合料生产工艺,为预溶法沥青改性过程的材料相容性问题提供新思路.实体工程施工经验表明:橡胶粉纤维多碎石沥青混合料施工工艺有别于普通的沥青混合料施工.通过对混合料的施工和易性分析,总结出施工控制函数,提出控制措施;并利用粘弹性理论分析混合料压实过程,提出有效压实能的概念.By comparing the results of two tests on different asphalt mixtures, the mechanisms of the crumb rubber-modified and fibers-reinforced asphalt mixture are analyzed. The results show that it can improve the high temperature stability of stone asphalt concrete by making use of the advantages of the fibers and the rubbers. Moreover, the technique of dry mixing crumb rubbers in asphalt mixture puts forward a new thought for compatibility between the modified-material and the asphalt. The construc- tion experiences indicate that the construction techniques of crumb rubber-modified and fibers-reinforced asphalt mixture are different from the general asphalt mixture. By means of the analysis on the workability of the asphalt mixture, the function of the construction control and the measures to ensure the construction quality are proposed. Finally, on the basis of viscoelasticity theory, a new concept of effective compaction power and a method to study the compaction techniques of asphalt mixtures are put forward.

关 键 词：道路工程 沥青混合料 纤维加筋 橡胶粉改性 高温稳定性 施工和易性 

分 类 号：U414.75[交通运输工程—道路与铁道工程]