A variety of methods have been employed in Finland, Norway, and Sweden for insulating the roads against frost. In recent years, foam plastics and expanded clay have been used as dry heat insulators. Finland has used a layer of frost-protecting material composed of sand, gravel of rock. Particular concern is expressed over the water absorption properties of the materials used, since slipperiness could result under extreme conditions. Insulating layers that are laid only a slight distance below the surface show indications of causing slipperiness and pavement cracks.

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  • Corporate Authors:

    Public Works Journal Corporation

    P.O. Box 688
    Ridgewood, NJ  United States  07451
  • Publication Date: 1974-4

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Filing Info

  • Accession Number: 00264567
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 19 1974 12:00AM