Abstract
This paper explains the effect of air void topology on the hydraulic conductivity and clogging properties of pervious asphalt. Cylinders of asphalt mixtures with a single type of aggregates and five gradations have been manufactured, Computed Tomography (CT) scanned and, transparent resin blocks with equivalent pore structure have been 3D printed to allow the visual inspection and quantification of the clogs. Geometrical properties, such as the macroporosity, air void diameter, Euler number and tortuosity, have been recorded from the CT scans. Furthermore, the hydraulic conductivity and clogging susceptibility of the asphalt cylinders and 3D-printed resin blocks have been measured.
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