排水沥青混合料最大理论相对密度确定方法

为了准确地测试排水沥青混合料最大理论相对密度,通过片麻岩和玄武岩两种石料的混合料试验,比较了理论计算法、真空实测法、溶剂法,以及沥青浸渍法几种不同的测试方法对排水沥青混合料最大理论相对密度的影响,分析了各试验数据的准确性和平行试验误差.结果表明,采用真空实测法测试排水沥青混合料最大理论相对密度是比较合理的.同时分析了影响真空实测法试验结果的主要因素,提出该试验的关键:松散沥青混合料试样要充分分散,抽真空时间15 min.

Methodology Study of Determining Maximum Theoretical Relative Density of Drainage Asphalt Mixture

Based on the tests of gneiss and basalt,the methods of the theoretical calculation,vacuum measurement,solvent and asphalt impregnation were compared to analyze the accuracy of the test data and parallel test errors to accurately test maximum theoretical relative density of drainage asphalt mixture.The results indicate that the measurement method by vacuum drainage asphalt mixture is more reasonable.Meanwhile,an analysis was made of the factors influencing the results by test methods of vacuum.A proposal was put forward that asphalt mixture be fully dispersed,and 15 min for vacuuming be a must.