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为更好地协调排水沥青混合料的耐久性与排水性之间的矛盾,把粗骨料空隙填充法(CAVF)设计方法引入到排水沥青混合料的组成设计当中,用毛体积相对密度作为衡量压实效果的指标,以压实试件达到最大毛体积相对密度时的温度作为最佳压实温度,在此温度下成型排水沥青混合料试件,并对其水稳定性、高温稳定性、渗水性与抗滑性能进行检验。试验结果表明:以压实试件达到最大毛体积相对密度时的温度作为最佳压实温度是合理的,设计的排水沥青混合料的水稳定性、高温稳定性、渗水性与抗滑性能均远远超过规范要求,即使在70℃的高温条件下也能表现出良好的稳定性,证明了采用CAVF设计方法设计骨架嵌挤结构沥青混合料的优越性。
In order to better coordinate the contradiction between the durability and drainage of drainage asphalt mixture, the design method of coarse aggregate void filling (CAVF) was introduced into the composition design of drainage asphalt mixture, and the relative density of gross volume was used as a measure Compaction effect of the index to compact the specimen to reach the maximum gross volume relative density of the temperature as the best compaction temperature at this temperature forming drainage asphalt mixture specimens and its water stability, high temperature stability, Water permeability and anti-skid performance test. The test results show that it is reasonable to use the temperature at which the maximum gross volume relative density is reached as the optimum compaction temperature. The designed water drainage asphalt mixture has the properties of water stability, high temperature stability, water permeability and skid resistance Far exceeding the requirements of the specification, showing good stability even under the high temperature of 70 ° C, and demonstrating the superiority of CAVF design method for designing skeletal inlaid asphalt mixture.