Characterization of Bonding between Asphalt Concrete Layer under Water and Salt Erosion
Characterization of Bonding between Asphalt Concrete Layer under Water and Salt Erosion
复制标题
水盐侵蚀下沥青混凝土层间粘结特性
DOI：
10.3390/ma12193055
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发表时间：
2019-10-01
期刊：
影响因子：
3.4
通讯作者：
Zhang, Yongbo
中科院分区：
文献类型：
--
作者：
Ran, Wuping;Zhang, Yu;Zhang, Yongbo
沥青路面层间接触状态不仅对路面结构的力学响应有重要影响，而且也是目前路面结构力学行为研究的瓶颈。本文通过45°倾斜剪切试验，研究了不同水盐进入方式、盐溶液浓度、温度耦合对基层与表层接触状态的影响及其规律。利用ABAQUS(法国巴黎达索)对各工况进行仿真验证，反求各层间的摩擦系数，表征各层间的实际接触状态，以实现综合评价和合理表达。结果表明，不同的模式对接触特性有不同的影响。在相同温度和盐溶液浓度下，水盐侵蚀结合最好，直接侵蚀次之，自下而上最差，层间结合条件随温度升高而减弱。软件模拟和试验分析的相对准确率高达92%，无水盐冲蚀试件在25℃时的摩擦系数约为0.85，而在14%的盐溶液中自下而上冲刷后的摩擦系数约为0.43，这表明水盐腐蚀将对路面结构层之间的结合状况产生很大影响。
The contact state between layers of asphalt pavement not only has a significant effect on the mechanical response of road structure but is also the bottleneck of research on the mechanical behavior of pavement structure at present. In this paper, the effects and laws of different water–salt entry modes, salt solution concentrations, and temperatures coupling on the contact state between base and surface layers are studied by a 45° inclined shear test. The simulation and verification of each working condition are carried out by ABAQUS (Dassault, Paris, France) the friction coefficient between layers is reversed, and the actual contact state between layers is characterized in order to realize comprehensive evaluation and reasonable expression. The results show that different modes have different effects on contact characteristics. At the same temperature and concentration of the salt solution, bonding of water and salt erosion is the best, followed by direct erosion, with the worst being from bottom to top, and the interlayer bonding condition is weakened with increase in temperature. The relative accuracy of the software simulation and test analysis was as high as 92% and the friction coefficient of the water-free salt erosion test piece was found to be about 0.85 at 25 °C, while after the bottom-up erosion of the 14% salt solution the friction coefficient was found to be about 0.43, which indicates that the corrosion of the water–salt will have a great effect on the bonding condition between the structural layers of the road.