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为了研究动水冲刷作用对沥青混合料性能的影响,利用自研的动水冲刷装置,针对不同空隙率的SMA-13沥青混合料进行动水冲刷试验,比较动水冲刷前后试件渗水系数、抗压强度、劈裂强度和质量等参数的变化;参照《公路沥青路面施工技术规范》中沥青混合料水稳定性评价标准,提出了基于动水冲刷前后抗压强度比和劈裂强度比的沥青混合料抗冲刷评价指标及标准建议值。研究结果表明:动水冲刷作用对沥青混合料性能有不利影响,空隙率不同,影响程度不同;抗压强度和劈裂强度均随空隙率增大而减小,空隙率8%左右的沥青混合料受动水冲刷后其衰减程度最大;动水冲刷后,渗水系数略有增大,质量损失随空隙率的增大而增加,但增加速率逐渐放缓。
In order to study the effect of dynamic water scouring on the performance of asphalt mixture, the dynamic scouring test of SMA-13 asphalt mixture with different porosity was carried out by using the self-developed moving water scouring device. Compressive strength, splitting strength and quality parameters. According to the evaluation criteria of water stability of asphalt mixture in the Technical Specifications of Asphalt Pavement Construction, the paper presents the compressive strength ratio and splitting strength ratio before and after dynamic water scour Asphalt anti-scouring evaluation index and standard recommended value. The results show that the effect of dynamic water scouring has an adverse effect on the properties of asphalt mixture, with different void contents and different degrees of influence. Both compressive strength and splitting strength decrease with the increase of void fraction. Asphalt mixing with about 8% When the moving water is scoured, the attenuation is the largest. After the moving water is scoured, the seepage coefficient increases slightly, and the mass loss increases with the increase of the porosity, but the rate of increase gradually slows down.