脱硫橡胶沥青试验研究  

Experimental Research on Desulfurized Rubber Asphalt

作　　者：李海滨[1] 盛燕萍[2] 

机构地区：[1]西安科技大学建筑与土木工程学院,西安710054 [2]长安大学交通铺面材料教育部工程研究中心,西安710061

出　　处：《武汉理工大学学报》2013年第5期50-54,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(52108047);河北省交通运输厅科技计划项目(Y-2011004;Y-2011005);中国博士后科学基金(2013M532005)

摘　　要：针对橡胶沥青易离析、高粘度等缺点,研究采用脱硫橡胶粉制备脱硫橡胶沥青,利用脱硫橡胶沥青溶胀模型,分析其改性机理,并对制备工艺展开研究,同时与普通橡胶沥青进行对照试验,研究脱硫橡胶沥青的性能。研究结果表明,脱硫橡胶粉比普通橡胶粉更易溶胀于沥青中,且伴有大量的化学结合,形成的脱硫橡胶沥青稳定性高;脱硫橡胶粉的最佳掺量为30%,加工工艺为剪切速率5 000r/min、剪切温度170～180℃、剪切时间60min,发育时间45min;脱硫橡胶沥青较普通橡胶沥青的各项路用性能均有所改善,特别是175℃旋转黏度仅为普通橡胶沥青的1/4～1/3,48h软化点差约为普通橡胶沥青的1/2。According to the easy segregation and high viscosity of rubber asphalt,desulfurization rubber asphalt was prepared with desulfurization rubber powder.Swelling model was used to analysis the modification mechanism.Preparing technique was also studied,and check experiment was taken to proclaim the pavement performance of desulfurization rubber asphalt;The results show that desulfurization rubber powder is easier to swell into asphalt,and combine with chemical which lead to high stability.The optimum added quantity of desulfurization rubber powder is 30%,shearing rate must be 5 000 r/min with shear temperature at 170~180 ℃,the best shear must be 60 min,while the curing temperatures is 45 min.All of the performance of desulfurization rubber asphalt are better than common rubber asphalt,especially the viscosity at 175 ℃ which only at 1/4~1/3 of common rubber asphalt,centrifugal softening point difference is lower than common rubber asphalt,desulfurization rubber asphalt own high storage stability.

关 键 词：脱硫橡胶沥青 溶胀模型 加工工艺 路用性能 

分 类 号：U414[交通运输工程—道路与铁道工程]