SBS改性沥青老化模拟及再生研究  

Research on aging simulation and recycling of SBS modified asphalt

作　　者：姚晓光 王燕 许涛[1] 张争奇[4] YAO Xiaoguang;WANG Yan;XU Tao;ZHANG Zhengqi(College of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China;College of Civil and Architecture Engineering,Chuzhou University,Chuzhou 239000,China;Key Laboratory of Road Structure and Material of Ministry of Transport(Changsha),Changsha University of Science&Technology,Changsha 410114,China;Key Laboratory of Highway Engineering in Special Region of Ministry of Education,Chang'an University,Xi'an 710064,China)

机构地区：[1]南京林业大学土木工程学院,江苏南京210037 [2]滁州学院土木与建筑工程学院,安徽酴州239000 [3]长沙理工大学道路结构与材料交通行业重点实验室(长沙),湖南长沙410114 [4]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《武汉大学学报（工学版）》2019年第12期1070-1078,共9页Engineering Journal of Wuhan University

基　　金：国家自然基金项目(编号:51008031);安徽省教育厅自然科学研究项目(编号:KJ2016B02);滁州学院本科教学质量与教学改革工程项目(编号:2018kcgg019);长沙理工大学道路结构与材料交通行业重点实验室开放基金资助项目(编号:kfj190304)

摘　　要：为研究不同再生方式对老化SBS改性沥青性能影响情况,首先通过常规试验、SHRP试验选择恰当的SBS改性沥青老化模拟方式;然后对4种再生方式:Ⅰ、掺加SK-90号基质沥青;Ⅱ、掺加SBS改性沥青;Ⅲ、掺加再生剂;Ⅳ、掺加再生剂+90号基质沥青展开探讨,确定了各再生方式的最佳条件,比较了各再生方式的优劣差异.试验结果表明:采用RTFOT试验进行老化模拟更加方便、科学,RTFOT试验5 h获得的改性沥青指标与服务年龄为7 a的SBS改性沥青一致;4种再生方式对老化沥青性能均有改善作用,且每种方式的新、旧沥青最佳比例及添加剂最佳掺量均不相同,在各自最佳条件下比对4种再生方式知,最优再生方式为Ⅱ,然后依次为Ⅲ、Ⅳ、Ⅰ.To study the effect of different recycling ways on the property of aged SBS modified asphalt,the SBS modified asphalt aging simulation method is selected by the routine test and the SHRP test firstly;and then four kinds of recycling methods are researched.The methodⅠandⅡadding to SK-#90 base asphalt and SBS modified asphalt respectively;the methodⅢadding regeneration agent;the last methodⅣ,adding regeneration agent and SK-#90 base asphalt.Finally,the best conditions and difference of every recycling way are explored.The results show that using RTFOT experiment in aging simulation is more convenient and scientific.The indicators of SBS modified asphalt after five hours RTFOT experiment accords with already was applied for seven years.Four kinds of recycling methods can improve the performance of aged asphalt.And the best proportion of new to old asphalt for every method and the optimal dosage of additives are different.Under the optimal condition,we can see that the best recycling method isⅡ,thenⅢ,Ⅳ,Ⅰ.

关 键 词：道路工程 SBS改性沥青 老化模拟 再生方式 最佳条件 

分 类 号：U416[交通运输工程—道路与铁道工程]