A study of water infiltration through asphalt road surface materials

Over the past few years, an extensive study has been carried out into factors influencing the infiltration of water through asphalt materials. The main factor influencing the infiltration of water through asphalt surfacing is the permeability of the asphalt. However, the hydrophobic properties of the bitumen in the asphalt also play a part. In this study, a new term, "normalised air voids", has been introduced, which accommodates both the voids and the size of the particles within the mix. The permeability of asphalt has been correlated with the normalised air voids. Asphalt has been categorised on the basis of permeability, with categories ranging from very low permeability to free-draining. Normalised air voids have also been found to have a correlation with road surface texture. In asphalt design, a balance needs to be reached between low permeability and good surface texture. (a) For the covering entry of this conference, please see ITRD abstract no. E211649.

  • Authors:
    • WATERS, T
  • Publication Date: 2004


  • English

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Filing Info

  • Accession Number: 01011268
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Dec 19 2005 2:58PM