SBS改性沥青高温性能评价指标的比较  

Comparison of Evaluation Parameters for High Temperature Performance of SBS Modified Asphalt

作　　者：黄卫东[1] 郑茂[1] 唐乃膨 鄯增平 HUANG Weidong ZHENG Mao TANG Naipeng SHAN Zengping(Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China Hebei Jitong Road ＆ Bridge Construction Co. , Ltd. Shijiazhuang 050021, China)

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]河北冀通路桥建设有限公司,河北石家庄050021

出　　处：《建筑材料学报》2017年第1期139-144,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51478351)

摘　　要：选取多掺量线型、星型SBS改性沥青进行DSR动态剪切时间扫描试验和多应力蠕变回复(MSCR)试验,比较了用于评价沥青高温性能的几种指标:车辙因子G*/sinδ,Shenoy不可恢复柔量1-1/(tanδ·sinδ)/G*以及在0.1,3.2kPa应力水平下10个周期内不可恢复蠕变柔量之平均值Jnr0.1,Jnr3.2的异同点,并对根据车辙试验得到的改性沥青混合料动稳定度与各评价指标之间的相关性进行回归分析.结果表明:当SBS掺量较低时,变化改性剂掺量对改性沥青高温性能的影响更为显著;随着SBS掺量的提高,线型、星型SBS改性沥青高温性能的差异缩小;1-1/(tanδ·sinδ)/G*,Jnr0.1在高温性能评价上均优于车辙因子,而Jnr3.2与改性沥青混合料动稳定度的相关性最差.Linear and radial SBS modified asphalt with varying polymer contents were selected to perform DSR dynamic shear time sweep test and multiple stress creep recovery（MSCR） test with the purpose of comparing these parameters in characterizing high temperature performance. Meanwhile, regression analysis were carried out between dynamic stability from wheel tracking test and these parameters. 1-1/（tanδ·sinδ）/G＊ , Jar results indicate that the effect of increasing SBS content is more prominent for binders at lower SBS content. Besides, Jnr results indicate that the performance gap between linear and ra- dial SBS modified binders reduces with the increase of SBS content. The regression analysis between dy- namic stability of modified asphalt mixture and these parameters indicate that1-1/（tanδ·sinδ）/G＊ and J,r G＂ 0.1 are better than G＂/sin 3 with respect to high temperature performance characterization, while Jn,3.2 owns the least relativity.

关 键 词：道路工程 SBS改性沥青 高温性能 车辙因子 不可恢复蠕变柔量 

分 类 号：U414[交通运输工程—道路与铁道工程]