Laboratory research on rheological behavior and characterization of ultraviolet aged asphalt
The influence of aging on the evolution of structural, morphological and rheological properties of neat asphalt was investigated by Fourier transform infrared (FTIR), atomic force microscopy (AFM) and dynamic shear rheometer (DSR),respectively. Asphalt was suffered under 20 W/m2 of UV radiant intensity and under the condition of aging time(0, 48, 96 and 144 h)with film thickness of 100 μm and film thickness of 50, 100, 200 and 500 μm after aging for 120 h, respectively, at certain UV radiant intensity 20 W/m2. Rheological results tested by DSR exhibit higher the complex shear (stiffness) modulus (G*) and lower phase angle (δ), compared to the virgin at the same test condition. The compositions analysis of asphalt before and after aging show an increase of carbonyl and sulfoxides, while a decrease of aromatic functional groups. With the increase of the component of asphaltene, obvious agglomerates of asphalten appear in neat asphalt surfaces after aging.
ultraviolet (UV) aging asphalt rheological behavior chemical microstructure morphology evolutions
WU Shao-peng(吴少鹏) ZHU Guo-jun(朱国军) CHEN Zheng(陈筝) LIU Zhi-fei(刘至飞)
Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China
国际会议
长沙
英文
369-373
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）