Laboratory and Field Evaluation of Porous Asphalt Concrete

Abstract

Porous asphalt concrete (PAC) is mainly applied to the surface drainage layer on high-speed trafficked highway pavements. The use of polymer-modified binder was shown to minimize the abrasion loss and enhance the durability of the PAC mixture. Test results indicated that using polymer-modified binder compared with unmodified binder reduced rutting and raveling, with the mixture containing high-viscosity binder showing the best performance in the field. There were indications of drainage improvement by replacement of traditional binders with polymer-modified binders according to measurements in the field. PAC pavement surfaces provided good frictional characteristics once the asphalt binder film was worn from the aggregate.