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PIARC (World Road Association), founded in 1909 and comprising 125 member governments from all over the world, is the global forum for exchange of knowledge and experience on roads, road transport policies and practices. With consultative status to the Economic and Social Council of the United Nations, the Association is contributing to a stable and sustainable global development of the road and transport sector.

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  4. Term of the Dictionary | impregnation

Term of the Road Dictionary

impregnation

  • Language : PIARC Road Dictionary / English
  • Theme : Roads Construction Flexible and Semi-Rigid Pavements
  • Definition : Spreading a liquid binder over an unsurfaced close-textured pavement layer, the viscosity of the binder being such that it can penetrate by capillarity through the voids in the upper portion of that layer. Note: this treatment is called ''road oiling'' if the purpose is mainly dust control on a low-volume road, and no additional layers are planned to be added; it is called ''penetration prime coat'' if the purpose is preparation of the base material prior to placing one or more additional layers.
  • Synonyms : road oiling (US) / penetration prime coat (US)