Zhang Guohong, Wu Haonan, Li Ping, Qiu Jianhui, Nian Tengfei
Department of Mechanical Engineering, Faculty of Systems Science and Technology, Akita Prefectural University, Akita 015-0055, Japan.
Gansu Provincial Communications, Planning, Survey & Design Institute Co., Ltd., Lanzhou 730030, China.
Polymers (Basel). 2022 Feb 18;14(4):803. doi: 10.3390/polym14040803.
The actual lifetimes of many highways are lower than that expected based on the initial pavement design, which brings increasingly prohibitive costs of pavement maintenance and repair. Although many works have been done, the real service lifetimes are still disappointing, and the researchers are also trying their best to increase the projects' life span. In this study, to comprehensively predict the durability and lifetime of newly designed asphalt mixture structures, an asphalt pavement project consisting of three hot mix asphalt (HMA) mixtures were evaluated. The mixtures were constructed in the pavement project of the Weiwu expressway in Gansu Province. Pavement properties of the asphalt mixtures, rutting and temperature fatigue factors of the dynamic modulus are discussed. The fatigue resistance is supposed to improve on increasing the vehicles' speed below the freezing point, which may be more suitable for applications in expressways. Meanwhile, the lifetime is measured according to the number of fatigue axle loads calculated, which were corrected between the specimens in the lab and the field core samples. Durability analysis prediction can be obtained based on the fatigue lifetime predictive model accordingly, which can provide more information about the fatigue lifetime and the rehabilitation planning of existing pavements in the future accordingly.
许多高速公路的实际使用寿命低于基于初始路面设计预期的寿命，这使得路面维护和修复成本越来越高。尽管已经开展了许多工作，但实际使用寿命仍然令人失望，研究人员也在尽力延长项目的使用寿命。在本研究中，为了全面预测新设计的沥青混合料结构的耐久性和使用寿命，对一个由三种热拌沥青（HMA）混合料组成的沥青路面项目进行了评估。这些混合料在甘肃省威武高速公路的路面项目中施工。讨论了沥青混合料的路面性能、动模量的车辙和温度疲劳因子。在冰点以下提高车辆速度时，抗疲劳性能有望提高，这可能更适用于高速公路。同时，根据计算出的疲劳轴载数量来测量使用寿命，这些轴载数量在实验室试件和现场芯样之间进行了校正。据此，可以基于疲劳寿命预测模型获得耐久性分析预测结果，从而为未来现有路面的疲劳寿命和修复规划提供更多信息。
