中文摘要：

沥青混合料由沥青结合料、集料和空隙构成,在离散元模型中的数字重构包括沥青结合料的重构、集料的重构和混合料的重构。以二维圆形颗粒对不同组分指定相应的接触特性,以反映各组分的力学机理,从微观角度给出了沥青混合料的结合特性,并利用离散元方法生成3种具有代表性空隙率的沥青混合料微观模型,以颗粒间的接触力矢量反映不同沥青混合料的骨架变化。

英文摘要：

Asphalt mixture is composed of asphalt binder, aggregate and air voids, then the digital reconstruction includes the reconstructions of asphalt binder, aggregate and mixture in discrete element model. In this paper, different components are specified corresponding contact characteristics by two-dimension circular particles to reflect the mechanical mechanism of different components and the cohesion properties of asphalt mixture from microscopic angle are given. In addition, three microscopic models of asphalt mixture are generated with representative air void content by discrete element method and the contact force vectors between particles are used to reflect the