基于加速加载试验的沥青混合料抗滑特性研究

Research on Skid Resistance of Asphalt Mixture Based on Accelerated Loading Test

为了研究级配类型、油石比与荷载大小对沥青混合料的抗滑性能影响及其衰变规律,基于室内试验制备了AC-13C沥青混合料车辙板试件,采用小型加速加载设备对其进行加速磨光,然后利用铺砂法和摆式摩擦系数测试仪分析其构造深度和摆值,最后基于灰关联法分析了3种不同因素对沥青混合料抗滑性能的影响程度。结果表明:沥青混合料的摆值与构造深度均随着加速加载次数的增加呈现出先急剧下降,后缓慢下降,最终趋于稳定。油石比与荷载值越大,对抗滑性能越不利。基于灰关联分析结果,级配类型对沥青混合料的抗滑性能影响程度最为显著。

In order to study the effects of gradation type,asphalt-aggregate ratio and load on the skid resistance of asphalt mixture and its decay rule,the rutting plate specimen of AC-13C asphalt mixture is prepared based on laboratory tests.The sample is accelerated and polished by small accelerated loading equipment,and then its structural depth and pendulum value are analyzed by using the sand laying method and pendulum friction coefficient tester.Finally,the influence degree of three different factors on the skid resistance of asphalt mixture is analyzed based on the grey correlation method.The results show that the pendulum value and structural depth of asphalt mixture decrease sharply first,and then slowly with the increase of accelerated loading times,and finally tend to be stable.The larger the asphalt-aggregate ratio and load value,the worse the skid resistance.Based on the results of grey correlation analysis,the gradation type has the most significant influence on the skid resistance of asphalt mixture.