Abstract：In order to study the influence of ratio of Whetstone on semi-flexible asphalt perfused composite pavement, the high temperature stability test, low temperature crack resistance test and water corrosion resistance test were done on the inflow semi-flexible composite pavement by gray correlation theory. Meanwhile, the experimental results and its mechanism was analyzed by molecular simulation technique. The results show that the performance of perfusion semi-flexible composite mixture is the best when the asphalt ratio is 2. 7%. According to results of the gray correlation, the strongest correlation between the asphalt ratio and inflow semiflexible composite pavement structure is the relative deformation ( PRD) . The diffusion behavior of asphalt in different Connolly radii was analyzed by molecular simulation technique. The results show that for semi-flexible composite road, as the asphalt ratio increases, the road performance gradually increases. When the amount of asphalt reaches a certain range, the road performance is no longer enhanced.

Keyword：perfusion semi-flexible composite pavement;gray correlation degree;micro mechanism;integrated road performance;