Effect of ageing on fatigue properties of asphalt
The fatigue properties of asphalts were investigated after various laboratory simulation ageing tests and outdoor natural exposure ultraviolet radiation ageing, by dynamic shear rheometer (DSR) time sweep fatigue test in constant strain model and a new type of specimen which was introduced to avoid the problem of adhesion failure between rotor and asphalt binder. The results show that outdoor natural exposure ageing (NEA) causes the decrease of retained fatigue life distinctly, and photodegradation caused by outdoor NEA of 1 250 μm thin films asphalt for three months, is found to be severer than pressure ageing vessel (PAV) with respects to retained fatigue life. The effect of photodegradation increases as the time of outdoor NEA increases. DSR time sweep fatigue test in constant strain indicates that the aged styrene-butadiene-styrene (SBS) modified asphalt still displays better fatigue properties than the corresponding base asphalt after ageing.
asphalt SBS modified asphalt ageing time sweep test fatigue property
WANG Ji(王佶) PANG Ling(庞凌) WU Shao-peng(吴少鹏) LIU Quan-tao(刘全涛) CHEN Zheng(陈筝)
Key Laboratory of Silicate Materials Science and Engineering, Ministry of Education,Wuhan University of Technology, Wuhan 430070, China
国际会议
长沙
英文
111-114
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）