Analysis of Asphalt Concrete Permeability Data Using Representative Pore Size

Abstract

The permeability of asphalt concrete has been the subject of much study by pavement engineers over the last decade. The work undertaken has tended to focus on high air voids as the primary indicator of permeable asphalt concrete. This paper presents a simple approach for understanding the parameters that affect permeability. Principles explained by Taylor in 1956 in channel theory work for soils are used to derive a new parameter—representative pore size. Representative pore size is related to the air voids in the compacted mix and the