Research on Anti-damage Performance of Asphalt Pavement Under UV Aging in Severe Cold Region of Xinjiang
LI Wenbo1,2, ZHANG Shuangxia1, SHI Qianqian1,*, YU Mingming1
1 Xinjiang Agricultural Vocational Technical College, Changji 831100,Xinjiang, China 2 National Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China
Abstract: To mitigate the structural performance deterioration of asphalt surface layers under the harsh environment in Xinjiang,by blending the nano-TiO2 and the basalt fibers into the asphalt mixture simultaneously, the experiment of the nano-TiO2 asphalt mastic after UV aging was conducted under a simulated UV-radiation test environment, including three major indicators, infrared spectra and scanning electron microscopy. In this study, four experiments were conducted, including freeze-thaw splitting test, high-temperature rutting test, semicircular bending and pulling (SCB) test, and four-point bending fatigue life test under UV aging on two typical surface asphalt mixtures AC-16 and SMA-16 in Xinjiang. Through these tests, this study aims to analyze the damage resistance of the asphalt mixture structure reinforced with nano-TiO2 and basalt fiber composite. The results show that 3.0% (mass fraction of asphalt) of nano-TiO2 can effectively resist the degradation of asphalt mastic due to aging. The deteriorating effect of UV aging can seriously weaken the road performance and fatigue life of AC-16 and SMA-16 asphalt mixtures. However, by adding nano-TiO2 and basalt fiber, the road performance of AC-16 and SMA-16 can be significantly improved, and also can effectively enhance the ability of asphalt mixture structure under UV aging to resist freeze-thaw damage, high-temperature deformation, low temperature cracking, and fatigue damage.
李文博, 张双侠, 史倩倩, 于明明. 新疆严寒区UV老化下的沥青路面抗损劣性能研究[J]. 材料导报, 2022, 36(21): 21100120-6.
LI Wenbo, ZHANG Shuangxia, SHI Qianqian, YU Mingming. Research on Anti-damage Performance of Asphalt Pavement Under UV Aging in Severe Cold Region of Xinjiang. Materials Reports, 2022, 36(21): 21100120-6.
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