基于MSCR的基质沥青老化高温性能  

High-temperature and Anti-aging Performance of Base Asphalt Based on MSCR

作　　者：彭红卫 聂忆华[2] 余沛涵 PENG Hong-wei;NIE Yi-hua;YU Pei-han(Hunan Communications Research Institute Co.,Ltd.,Changsha,Hunan 410015,China;College of Civil Engineering,Hunan University of Science and Technology,Xiangtan,Hunan 411201,China)

机构地区：[1]湖南省交通科学研究院有限公司,湖南长沙410015 [2]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《黑龙江交通科技》2023年第8期1-4,共4页Communications Science and Technology Heilongjiang

基　　金：湖南省交通科技项目(201409);湖南省交通科技项目(201410)。

摘　　要：针对50#、70#、90#三种基质沥青,采用旋转薄膜烘箱试验模拟沥青不同老化时间;基于多应力蠕变恢复试验(MSCR),在两种不同测试应力、三种不同测试温度下测得各沥青试样的不可恢复蠕变柔量J_(nr)和变形恢复率R,进行老化高温性能变化规律分析。试验发现:三种沥青的J_(nr)和R均符合老化动力学变化规律,其中90沥青J_(nr)、R老化速率均最大;测试温度、应力越大,沥青抗变形能力下降。For the three base asphalts of A-50#,A-70#,and A-90#,the rotating thin-film oven test is used to simulate different asphalt aging times to obtain asphalt sample with different degrees of aging.Based on the Multiple Stress Creep Recovery test(MSCR),measured at two different test stresses and three different test temperatures,the non-recoverable creep compliance J_(nr) and the deformation recovery rate R of each asphalt sample are analyzed.It is found that the J_(nr) and R of the three base asphalts are in accordance with the aging kinetic change law,and A-90#asphalt is of the largest aging rates characterized by the J_(nr) and R;the greater the test temperature and test stress,decrease of the anti-deformation ability of the base asphalt.

关 键 词：多应力蠕变恢复试验(MSCR) 基质沥青 高温性能 

分 类 号：U416.1[交通运输工程—道路与铁道工程]