ABSTRACT
Through establishing discrete element models of rubber asphalt and HMA, the authors elaborated the meso-damage mechanism of each mixture. With the adhesion index of asphalt and fine aggregate and a revised evaluation method of durability of rubber asphalt, the improvement of durability with additives of TAFPACK-Super (TPS) modifier was evaluated. An optimized scheme of TPS modified rubber asphalt pavement was developed based on lab tests. To study the influence of various factors on elastic modulus of rubber asphalt, a meso-mechanical model to predict microscopic performance of composite mixture was established. With the FE analysis of ice layer and its state of stress and strain, the relevance between de-icing efficiency and internal and external factors such as environment temperatures, ice thickness, elastic modulus of mixtures, structures combination. The results revealed ice removal mechanism of rubber asphalt and elaborated the effectiveness of environmental conditions, working status and optimum structural arrangements.
