ABSTRACT
In this paper, specimens of porous asphalt mixture with design porosities of 18%, 20%, and 25% are produced. Use wind-blown sand to clog these PAC specimens and clean them with vacuum pump and high-pressure water. Use X-ray CT to get CT images of PAC in the initial and after cleaning, and process these CT images to build 3D digital model of pore. Use Fluent software to numerically simulate of water seepage characteristics. Comparing the changes in the seepage rate of the pore model under vacuum pump and high-pressure water cleaning, the results show: the vacuum pump cleaning has a better effect on the water seepage rate recovery of the small porosity specimens. The high-pressure water cleaning effect increases with the increase of porosity, the average water seepage rate recovery rate of the 18% porosity model after the vacuum pump cleaning is 49.90% and the 25% porosity model after high-pressure water cleaning is 53.25%.
