Research on Adhesion between Asphalt and Aggregate Based on Surface Energy Theory

In order to explain the adhesion between asphalt and aggregate,surface energy theory was used to obtain parameters of two kinds of asphalt and aggregate respectively by the Wilhelmy plate method and the column wicking technique.Adhesive work and difference of surface energy will be gained.Cohesion within the asphalt and the adhesive process and flaking process in the presence of water as well as in the absence of water can be explained.The absolute value of the wet adhesive energy divided by the dry adhesive energy is introduced to evaluate the adhesion of different asphalt-aggregate systems.The results indicate that performance of SBS modified asphalt-hornblende gneiss system(SBS-J) is the best.Surface energy theory can explain the adhesive process and flaking process very well.