• Publisher-DOI

The benefits and properties of porous asphalt (PA) pavements were initially summarised based on a literature review. Further, the influence of modifications using different combinations of carbon and cellulose fibre was shown by laboratory tests carried out by the Institute of Transportation Infrastructure Engineering of Technical University of Darmstadt. The main focus of this paper is to characterise the permeability of porous asphalt by using asphalt petrology, a geology-based method adapted for analysing the internal structure of asphalt samples. This method introduces new parameters, such as the void surface area subdivided into classes. These parameters allow further attributes of the asphalt to be inferred, as was shown for vertical permeability in this paper. To this end, a function was successfully developed and applied to predict the permeability of asphalt specimens.