Abstract
Partial plastic flow of porous asphalt surface course and particles of binder course mixture blowing up from its porosity, due to stripping of the underlying mixture have been observed. Judging from serviceability surveys of porous asphalt in heavy traffic sections of a Japanese expressway, it was found that its underlying layers are more likely to be damaged in mountainous sections with higher annual rainfall and shorter annual daylight time. Asphalt layers in such problematic sections would be damaged in strength of stiffness.
