基于多应力重复蠕变恢复的改性沥青高温性能评价研究  

Research on High Temperature Performance Evaluation of Modified Asphalt Based on Multi-stress Repeated Creep Recovery

作　　者：朱元军 李英涛 付新新 ZHU Yuanjun;LI Yingtao;FU Xinxin(Jiangsu Xiandai Road&Bridge Co.Ltd,Nanjing Jiangsu 210049,China;Jiangsu Highway Engineering Maintenance Co.Ltd,Nanjing Jiangsu 211106,China;Jiangsu SinoRoad Engineering Research Institute Co.Ltd.,Nanjing Jiangsu 211800,China)

机构地区：[1]江苏现代路桥有限责任公司,江苏南京210049 [2]江苏高速公路工程养护技术有限公司,江苏南京211106 [3]江苏中路工程技术研究院有限公司,江苏南京211800

出　　处：《交通节能与环保》2020年第3期98-100,共3页Transport Energy Conservation & Environmental Protection

摘　　要：为了研究改性沥青在高温条件下的粘弹性能,选择混合型、线型、星型3种改性沥青进行多应力蠕变恢复试验(MSCR),本文采用了累积应变和蠕变劲度的黏性成分中的不可恢复的部分两个指标对改性沥青的高温性能进行评价。结果表明:在高掺量条件下混合型SBS高温性能较好,在低掺量条件下线型SBS高温性能较好,星型高温性能较其余两者较差;且随着SBS含量的增加不可恢复部分的值最呈减小趋势,说明高掺量的SBS改性沥青更能满足重交通的要求。In order to study the viscoelastic properties of modified asphalt under high temperature conditions,three types of modified asphalt,mixed,linear and star,were selected for multi-stress creep recovery test(MSCR),and used the nonrecoverable part of the viscous composition of creep stiffness and cumulative strain to evaluate the high temperature performance of modified asphalt.The results show that the high temperature performance of mixed SBS is better under the condition of high content,the linear SBS is better under the condition of low content,and the star SBS is worse than the other two;and with the increase of SBS content,the value of unrecoverable part shows the most decreasing trend,which shows that the SBS modified asphalt with high content can meet the requirements of heavy traffic better.

关 键 词：蠕变恢复 多应力 重复蠕变 改性沥青 不可恢复 高温性能 

分 类 号：U416.217[交通运输工程—道路与铁道工程]