THICKNESS OF BARK LAYER IN FROST PROOF ROADS /IN NORWEGIAN/

FOR ABOUT TEN YEARS, BARK FROM SPRUCE AND PINE HAS BEEN USED AS A FROST ACCUMULATING FOUNDATION FOR RAILWAYS AND ROADS IN SWEDEN AND NORWAY. OBSERVATIONS OF FROST PENETRATION AND FREEZING INDEX WERE RECORDED FOR FOURTEEN STATIONS. THE FREEZING INDEX AND THE TIME REQUIRED FOR THE FROST PENETRATION THROUGH EACH SEPARATE COURSE WERE DETERMINED AND THE THEORETICAL COMPUTATION OF THE FROST RESISTANCE WAS CARRIED OUT FOR TWO DIFFERENT SETS OF CONDITIONS. A THERMAL DESIGN CHART IS PRESENTED, BASED ON A FORMULA FOR THE DESIGN FREEZING INDEX. IT IS CONCLUDED THAT THE CORRELATION BETWEEN THE CALCULATED AND OBSERVED FROST RESISTANCE IS SATISFACTORY. NORMAL VARIATIONS IN THE MOISTURE CONTENT OF THE BARK DO NOT SEEM TO HAVE SIGNIFICANT EFFECT ON THE FROST RESISTANCE.

  • Supplemental Notes:
    • No 5, pp 15-22, 7 FIG, 15 REF
  • Corporate Authors:

    Royal Norwegian Council Sci & Ind Res

    ,    
  • Authors:
    • Knutson, A
  • Publication Date: 1971-12

Subject/Index Terms

Filing Info

  • Accession Number: 00238041
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 2 1972 12:00AM