摘要
为了分析基质沥青中橡胶粉掺量对Sasobit温拌橡胶沥青短期老化性能影响,进行了老化前后25℃针入度、软化点、180℃旋转黏度以及25℃弹性恢复试验,并计算其25℃残留针入度比、软化点增量、180℃旋转黏度比以及25℃弹性恢复比。研究结果表明:在基质沥青中掺入橡胶粉,有助于提高Sasobit温拌橡胶沥青的抗短期老化性能;短期老化使得橡胶粉进一步溶胀;当橡胶粉掺量多于20%时,Sasobit温拌橡胶沥青流动性变差,老化后黏度快速增大,黏度比增大较快,抗短期老化能力略有降低。
In order to analyze the effect of rubber powder content in matrix asphalt on the short-term aging performance of Sasobit warm mix rubber asphalt,the tests,including penetration at25 ℃, softening point,rotational viscosity at180 ℃ and elastic recovery at25 ℃,were carried out before and after aging,and the residual penetration ratio at25 ℃,increment of softening point,ratio of rotational viscosity at180 ℃ and elastic recovery ratio at25 ℃ were calculated.The result shows that,providing rubber powder mixed into matrix asphalt,the short term anti-aging performance of Sasobit warm mix rubber asphalt is enhanced;the rubber powder further swells after short term aging;when the rubber powder content is more than20 %,the fluidity of Sasobit warm mix rubber asphalt becomes worse,and when aging,the viscosity increases rapidly,the viscosity ratio increases fast relatively,and the resistance to short term aging decreases slightly.
作者
杨国良
谢礼焕
黄祥鹏
陈志豪
黄征
李伟健
蓝涛
YANG Guoliang;XIE Lihuan;HUANG Xiangpeng;CHEN Zhihao;HUANG Zheng;LI Weijian;LAN Tao(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;GZHU Engineering Inspection and Consulting Co.,Ltd.,Guangzhou 510006,China)
出处
《路基工程》
2019年第4期96-99,115,共5页
Subgrade Engineering
基金
广州大学大学生创新训练项目(CX2017103)
广州大学大型设备开放共享基金项目(广大〔2018〕120号)
