THE DURABILITY OF BARK IN ROAD CONSTRUCTIONS. LABORATORY EXPERIMENTS /IN NORWEGIAN/

LABORATORY EXPERIMENTS ARE PRESENTED TO SHOW CORRELATIONS BETWEEN THE RATE OF BARK DECOMPOSITION AND TEMPERATURES, WATER CONTENTS, AND CONCENTRATIONS OF GASEOUS OXYGEN AND CARBON DIOXIDE. RELATIVE VOLUMES AND TIMES OF DECOMPOSTION AS WELL AS WEIGHT LOSS ARE INCLUDED FOR DETERMINING THE DRY WEIGHTS OF THE SAMPLES. BRIEFLY, THE LABORATORY EXPERIMENTS INVOLVED COVERING ABOUT 50 GRAMS OF BARK AND A LEAST 65% WATER WITH A SEMI-PERMEABLE PLASTIC SHEET. THEN VOLUME MEASUREMENTS WERE TAKEN. THE RESULTS SHOW THAT: (1) STORED, PARTLY DECOMPOSED SPRUCE BARK AND FRESH PINE BARK, MAINLY CORK BARK HAD THE LOWEST - LOSSES OF WEIGHT AND VOLUME. (2) AFTER THE BARK HAD BEEN COMPRESSED AND COMPLETELY COVERED WITH 20 CM OF SAND, THE CONDITIONS IN THE BARK LAYERS WERE MAINLY ANAEROBIC. (3) THE AVERAGE WEIGHT LOSSES WERE THE SAME FOR THE FIRST TWO YEARS.

  • Supplemental Notes:
    • NO NR 6
  • Corporate Authors:

    Royal Norwegian Council for Scientif & Ind Res

    Gaustadalleen 25
    Oslo 3,   Norway 
  • Authors:
    • Solbraa, K
  • Publication Date: 1972-4

Media Info

  • Features: Figures; References;
  • Pagination: p. 25-31
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00238064
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 7 1972 12:00AM