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)

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