Cui Peide, Xiao Yue, Fang Mingjing, Chen Zongwu, Yi Mingwei, Li Mingliang
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
School of Transportation, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel). 2018 May 25;11(6):892. doi: 10.3390/ma11060892.
Asphalt pavement is widely used for expressways due to its advantages of flexibility, low cost, and easy maintenance. However, pavement failures, including cracking, raveling, and potholes, will appear after long-term service. This research evaluated the residual fatigue properties of asphalt pavement after long-term field service. Fatigue behavior of specimens with different pavement failure types, traffic load, service time, and layers were collected and characterized. Results indicate that after long-term field service, surface layer has a longer fatigue life under small stress levels, but shorter fatigue life under large stress levels. Longer service time results in greater sensitivity to loading stress, while heavier traffic results in shorter fatigue life. Surface and underneath layers present very close fatigue trend lines in some areas, indicating that the fatigue behavior of asphalt mixture in surface and underneath layers are aged to the same extent after eight to ten years of field service.
由于具有柔韧性、成本低和易于维护等优点，沥青路面在高速公路中得到广泛应用。然而，经过长期使用后，路面会出现包括裂缝、松散和坑洼等病害。本研究评估了长期现场服役后沥青路面的残余疲劳性能。收集并表征了不同路面病害类型、交通荷载、服役时间和层位的试件的疲劳行为。结果表明，经过长期现场服役后，表面层在小应力水平下具有较长的疲劳寿命，但在大应力水平下疲劳寿命较短。服役时间越长，对加载应力的敏感性越高，而交通量越大，疲劳寿命越短。表面层和下面层在某些区域呈现非常接近的疲劳趋势线，表明经过八到十年的现场服役后，表面层和下面层沥青混合料的疲劳行为老化程度相同。
