多孔安山岩在沥青路面中的应用研究

采用沥青浸渍集料、浸渍集料混合料、浸渍沥青混合料3种不同的沥青浸渍法和计算法分别确定沥青混合料的最大理论相对密度,并进行配合比设计,确定最佳油石比。对比分析了沥青混合料的各项路用性能,对未掺加抗剥落剂、掺加液体抗剥落剂和掺加消石灰的安山岩沥青混合料,分别进行了常规水稳定性能试验和汉堡车辙试验。结果表明:较之计算法,采用沥青浸渍法确定安山岩沥青混合料的最大理论相对密度进行配合比设计得到的沥青混合料各项路用性能更优;汉堡车辙试验可以很好地评价沥青混合料的水稳定性能,对于多孔安山岩,掺加消石灰为提高沥青混合料水稳定性能的最佳措施。

Study on application of porous andesite in asphalt pavement

Three kinds of asphalt immersion methods (aggregate immersion method, aggregate mixture immersion method, and asphalt mixture immersion method) and calculation methods were used to test the maximum theoretical relative density of the asphalt mixture. Mix ratio design was carried out to determine the optimal asphalt content and all the pavement performances of asphalt mixtures were compared and analyzed. The general water stability property tests and HWTD were used to test the water stability of three kinds of andesite asphalt mixtures which added with no anti stripping agent, liquid anti stripping agent and hydrated lime. The results showed  that the pavement performance of asphalt mixtures, which were  manufactured by using the asphalt immersion method to determine the maximum theoretical relative density of asphalt mixture and carry out the mix design, is better than that of the asphalt mixture manufactured by using the calculation method; and HWTD could effectively evaluate the water stability property of asphalt mixtures . Adding hydrated lime is the optimum measure to improve the water stability property of andesite asphalt pavement.