FROST-HEAVE PROTECTION USING INSULATING MATERIALS /IN NORWEGIAN/

THE BALANCE OF ABSORBED HEAT IN THE GROOUND DURING THE SUMMER PERIOD AND THE HEAT LOSS DURING THE WINTER AS A BASIS FOR APPLYING INSULATING MATERIALS TO PREVENT FROST HEAVE IS DISCUSSED AND THE ACTUAL MECHANISM OF INSULATION. EXPERIMENTAL RESULTS SUPPORTING THE THEORY ARE QUOTED. DESIGN CRITERIA ARE ALSO DISCUSSED. LABORATORY EXPERIMENTS SHOW, HOWEVER, THAT MOST AVAILABLE INSULATING MATERIALS SUITABLE FOR ROAD CONSTRUCTION ABSORB MOISTURE UNDER NORMAL WORKING CONDITIONS TO AN EXTENT WHICH WILL REDUCE THE INSULATING EFFECT OF THE MATERIAL CONSIDERABLY IN A FEW YEARS TIME. FULL-SCALE EXPERIMENTS GIVE THE SAME INDICATION. FOR INCREASED LONG-TERM EFFICIENCY THE AUTHOR SUGGESTS THAT THE INSULATING MATERIAL SHOULD BE PROTECTED BY A MOISTURE PROOF COATING OR SKIN. FULL-SCALE EXPERIMENTS SHOW THAT POLYSTYRENE FOAM WRAPPED IN SEALED POLYETHYLENE FOIL MAY PROVE SUITABLE FOR ROAD CONSTRUCTION PURPOSES. FURTHER STUDIES OF THESE MATERIALS ARE HOWEVER, NECESSARY. FINALLY SOME EXAMPLES ARE GIVEN OF FROST-PROOF ROAD-BASE DESIGN USING INSULATING MATERIALS. THE COST OF CONSTRUCTION FOR SOME OF THE EXAMPLES IS COMPARED WITH THE COST OF CONVENTIONAL FROST-PROOF ROAD-BASES. FOR TRANSPORT DISTANCES ABOVE 10 KM FROST INSULATING MATERIALS GIVE THE MOST FAVORABLE SOLUTION. /SVV/RRL/

  • Supplemental Notes:
    • No 35, 15 PP, 16 FIG, 3 PHOT, 8 REF
  • Authors:
    • Skogseid, A
  • Publication Date: 0

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00237625
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Nov 23 2000 12:00AM