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通过实验室配制人工酸雨,模拟了PH=2.0和PH=7.0的人工雨水对沥青混合料的腐蚀。试验结果表明:与PH=7.0的环境相比,在PH=2.0的人工酸雨循环腐蚀下的AC13和AM13沥青混合料出现了质量损失;空隙率增加;马歇尔稳定度、残留马歇尔稳定度和劈裂抗拉强度的下降,说明雨水PH值是沥青路面损坏中的重要因素之一;并通过电子显微镜观察材料内部,发现了酸雨对材料的腐蚀及其宏观性能的下降与材料内部微裂缝的发展有关。
Artificial acid rain was prepared in laboratory to simulate the corrosion of asphalt mixture by artificial rainwater with PH = 2.0 and PH = 7.0. The experimental results show that there is mass loss of AC13 and AM13 asphalt mixture under the cyclic corrosion of PH = 2.0 with PH = 2.0; the porosity increases; Marshall stability, residual Marshall stability and splitting The decrease of tensile strength indicates that the PH value of rainwater is one of the important factors in the damage of asphalt pavement. By observing the inside of the material by electron microscope, it is found that the corrosion of the material by acid rain and the decrease of macroscopic property are related to the development of microcracks inside the material .