RAILROADS in the frozen North are not in danger of damage from permafrost, the permanently frozen ground underlying one-fifth of all land on earth, if they are protected with an inexpensive insulation blanket. Used on Norwegian railroads since 1945, the blanket consists of a dry top layer of gravel and a moist bottom layer of peat, tree bark or discarded railroad ties. This combination holds what heat there is near the surface. By 1970 all Norwegian railroads will be protected against frost-heaving with such blankets.

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  • Corporate Authors:

    Science Services, Incorporated

    1719 N Street, NW
    Washington, DC  United States  20036
  • Publication Date: 1964-2-1

Media Info

  • Pagination: p. 73
  • Serial:
    • Science News
    • Volume: 85
    • Issue Number: 5
    • Publisher: Science Services, Incorporated
    • ISSN: 0036-8423

Subject/Index Terms

Filing Info

  • Accession Number: 00084076
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 10 1975 12:00AM