Study on permeability performance decay law and clogging test of porous asphalt mixture

In order to solve the pores clogging of porous asphalt mixture, the self-designed constant water head permeameter was used in the clogging simulation test of PA-13 standard Marshall specimens with different porosities, and the decay law of the water permeability was studied. The results showed that the clogging process of porous asphalt mixture was divided into four stages: fast clogging, partial recovery, slow and stable clogging. The particulate matter was mainly blocked at a depth of 15-20 mm in the asphalt mixture.