中文摘要：

为了真实反映沥青混合料的结构特征,构建沥青混合料微观结构模型,解决沥青混合料微观结构分析存在的关键问题,采用多模型体随机产生技术,以球形单元为基本计算单元,多个球形单元粘结在一起形成不同形状的多面体与混合料中粗集料匹配,较小的具有粘性的球形单元（一般小于0.1 mm）模拟沥青玛蹄脂,从而重构沥青混合料微观结构.与传统重构技术相比,该方法无需大量试验及复杂的处理技术,操作简单;不仅能够考虑沥青混合料中粗集料的形状、级配、空间排列及表面纹理等情况,而且能够考虑特殊颗粒（针片状颗粒）体积分数等条件.

英文摘要：

In order to describe the characters of asphalt mixture structure exactly, this paper built its microstructure model and gave a better solution for key problems existing in the analysis of its microstructure. Based on a random algorithm, the simulation of polygonal particles was carried out with digital restructure technique. In this technique, balls were used as basic elements, and a number of balls were bonded together to form a polygonal particle which could simulate the aggregate of asphalt mixture. Then, a lot of smaller balls with viscosity were used to simulate the asphalt mastic. Compared with traditional restructure techniques, the digital restructure technique has the following advantages： it needs less lab tests and processing program; not only shapes, gradations, spatial arrangement and surface textures of aggregates, hut also the content of peculiar aggregates（long and slender particles） can be considered. 1 tab, 5 figs, 10 refs.