高温多雨地区表面层沥青混合料级配的选择

选取10种级配，以混合料的结构密实性、浸水车辙稳定性和压实性能为基础，提出了在高温多雨地区，满足表面层混合料结构和性能要求的连续密级配的选择方法，研究表明：最大密实线和Superpave控制点可作为了解混合料结构、压实性和永久变形特性的参数依据；在最大密实线和控制点下限之间选取连续密级配，可使混合料兼具良好的结构密实性、浸水车辙稳定性和压实性能，混合料也因此更适用于环境因素复杂的高温多雨地区。

A Selection Method of Gradation of Asphalt Mixture Used in Surface Course of High Temperature and Rainy Regions

On the basis of the structural compaction, the wet rutting potential, and the compactable ability of asphalt mixtures, a method is introduced to select the continuous aggregate gradations in the high temperature and rainy regions. Ten gradations are selected. Results indicate that the maximum density line (MDL) and the Superpave control points (CPs) can be used as the important parameters to learn the structure, the compactability, and the permanent deformation potential of mixtures. When the gradation is selected in the gap between the MDL and the lower Superpave CPs, the mixture has a better structural compaction, compactability and wet rutting resistance, so it is appropriate to select the continuous gradation in this range for designing mixtures used in the high temperature and rainy regions.