不同级配对沥青混合料矿料间隙率的影响

沥青混合料矿料间隙率过大或过小都会对沥青混合料的路用性能产生不利影响。矿料间隙率对沥青混合料强度、耐久性和高温稳定性有很高的敏感度，是沥青混合料设计的一个重要参数之一。主要研究了不同级配对矿料间隙率的影响，通过马歇尔正交试验分析了级配对沥青混合料AC-13矿料间隙率的影响，得出了矿料间隙率与贝雷法评价级配的参数的关系。

Different Gradations' Influence on the Voids in the Mineral Aggregate(VMA) of the Bituminous Mixture

VMA being too much or too less will have a bad effect on the road performance of asphalt mixture. And VMA is highly sensitive to the strength of the asphalt mixture, its durability, and high temperature stability. Voids in the Mineral Aggregate （VMA） of the bituminous mixture is one of the most important parameters of bituminous mixture design. At present, the Marshall, Superpave and Chinese design method of bituminous mixtures only stipulate a minimum VMA according to the maximum nominal size of aggregate without regard to other significant aggregate - related properties. Among so many factors influencing VMA, the paper mainly researches on different gradations＇ influence on VMA. The paper analyzes gradation＇ s influence on the VMA of the bituminous mixture AC -13 with Marshall orthogonal experiment. It comes to a rule that VMA changes with the parameters of the evaluation of gradation.