Abstract：To research the horizontal voids distribution characteristics of porous asphalt pavement, the core samples from one cross section of Ninghang highway were incised, and the digital image processing technology was used to analysis the void characteristics at different sections of the core samples. The results show that the main reason of clogging in porous asphalt pavement comes from subsidence of runoff suspended particles during rainfall. The deep section clogging is more serious than that in the shallow section, and the outside section clogging becomes more serious along the flow direction. The ratio of void clogging in shallow section of inside wheel track is less than that of nonwheel track. During the usage of porous asphalt pavement, the effect of wheel loads leads to further compaction, and the voids of wheel track and heavy lane are relatively small. Double porous asphalt layers and inside low lateral high slope can slow down the clogging of porous asphalt pavement.
2018, Vol. 39 
