Water/gas Permeability of Bituminous Mixtures and Involvement in Blistering Phenomenon

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  • Sasaki Iwao
    Material and Geotechnical Engineering Research Group, Incorporated Administrative Agency Public Works Research Institute
  • Moriyoshi Akihiro
    Div. of Built Environment, Graduate School of Engineering, Hokkaido University
  • Hachiya Yoshitaka
    Airport Dept., National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure and Transport

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  • 歴青系舗装の透水および透気性状とブリスタリング現象との関係

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Abstract

The blistering phenomenon is one of the major damages in bituminous pavement during a hot summer. The phenomenon was believed to be caused by water permeating from outside via channels of connected pores in bituminous mixtures. However, the surface course in bituminous pavement is not permeable to water, particularly near the blistering area. Therefore, permeation of liquid water is unlikely to be responsible for the water accumulation that causes the blistering phenomenon. Moisture vapor in the air is important in water intrusion into bituminous mixtures. This study examined moisture transfer mechanisms in bituminous pavements, focusing on the coefficient of permeability of pavement mixtures of both liquid water and humid air (i.e. air containing water vapor).<br>

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