沥青胶结料高温变形评价指标及性能研究  

Study on High Temperature Stability Evaluation Indexes and Properties of Asphalt

作　　者：韩良 HAN Liang(Traffic construction quality and safety supervision station of Xiangtan,Xiangtan,Hunan 411100,China)

机构地区：[1]湘潭市交通建设质量安全监督站,湖南湘潭411100

出　　处：《黑龙江交通科技》2023年第9期14-16,共3页Communications Science and Technology Heilongjiang

摘　　要：为研究沥青胶结料高温变形评价指标,根据PG分级标准和我国现行的针入度分级标准之间的特点,选用两种基质沥青和两种SBS改性沥青分别进行沥青胶结料PG高温分级和针入度分级。采用动态剪切流变仪(DSR)测得抗变形车辙因子G^(*)/sinδ后,通过灰色关联法拟合25℃针入度、软化点、针入度指数PI、当量软化点T_(800)等与G^(*)/sinδ的相关性。根据研究结果可知当量软化点T_(800)与G^(*)/sinδ关联度最高。In order to investigate the high temperature stability evaluation indexes of asphalts,According to the characteristics between the performance grade standard and the penetration grade standard in our country,two kinds of matrix asphalt and two kinds of SBS modified asphalt are selected to carry out the performance grad high temperature grading and penetration grading of asphalt binder respectively.Dynamic Shear Rheometer(DSR)was used to measure the anti deformation rut factor G^(*)/sinδ.The correlation between G^(*)/sinδand 25℃penetration degree,softening point,penetration index PI,equivalent softening point T_(800)of was fitted by Grey correlation Method.According to the research results,the correlation between G*/sinδand equivalent softening point T_(800)is the highest.

关 键 词：沥青胶结料 高温性能 老化性能 PG分级 针入度标准 

分 类 号：U416.1[交通运输工程—道路与铁道工程]