SBS改性沥青短期老化性能研究  

Study on Short-term Aging Performance of SBS Modified Asphalt

作　　者：高磊 喻金楼 聂桂海 罗雪平 GAO Lei;YU Jin-lou;NIE Gui-hai;LUO Xue-ping(Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学,广州市510006

出　　处：《北方交通》2021年第1期54-57,共4页Northern Communications

摘　　要：采用室内薄膜老化试验模拟SBS改性沥青短期热氧老化过程,对老化前后不同掺量SBS的改性沥青进行常规试验,分析老化前后改性沥青25℃针入度、软化点、60℃和135℃旋转黏度以及25℃弹性恢复率等指标,并计算25℃残留针入度比、软化点增量。研究结果表明:老化前后改性沥青的软化点、旋转黏度、10℃延度等指标与SBS改性沥青中SBS含量的相关关系具有一致性;当SBS改性剂掺量小于4%时,上述指标均随SBS改性剂掺量的增加而增加;针入度与SBS改性剂掺量呈负相关;且在SBS改性剂掺量为4%时,抗短期老化能力最佳。The indoor film aging test was used to simulate the short-term thermal oxygen aging process of SBS modified asphalt,and the conventional test was carried out for SBS modified asphalt with different content before and after aging.The penetration at 25℃,softening point,rotational viscosity at 60℃,135℃and elastic recovery rate at 25℃before and after aging were analyzed.The results show that the softening point,rotational viscosity,10℃ductility and other indexes before and after aging are consistent with the SBS content in SBS modified asphalt;when the content of SBS modifier is less than 4%,the above indexes increase with the increase of SBS modifier;the penetration is negatively related to the content of SBS modifier;and when the content of SBS modifier is 4%,the short-term aging resistance is the best.

关 键 词：道路工程 SBS改性沥青 短期老化 抗老化能力 

分 类 号：U414.75[交通运输工程—道路与铁道工程]