Tests are being conducted by city highway engineers in Calgary, Alberta, to help determine the effectiveness of sulfur foam as an insulating material to prevent frost heaves in road and highway construction. One field application, which is 85 percent sulfur in content, is produced when a blowing agent is mixed with specially modified molten sulfur. The agent produces small gas bubbles which cause the liquid sulfur material to foam. when cooled, the foam becomes rigid. The product has low density, high strength and a uniform celluar structure. Tests have shown that seven feet of gravel can be replaced with between three and four inches of sulfur foam covered about three feet of gravel to provide a stable load-bearing surface and to provide thermal insulation to protect underlying permafrost.

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  • Corporate Authors:

    Public Works Journal Corporation

    P.O. Box 688
    Ridgewood, NJ  United States  07451
  • Publication Date: 1975-2

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Filing Info

  • Accession Number: 00082840
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 26 1975 12:00AM