FROST PROTECTION OF EXISTING ROADS BY A TOP INSULATING LAYER

A METHOD OF FROST INSULATION OF EXISTING ROAD USING EXTRUDED POLYSTYRENE BOARDS OF HIGH COMPRESSIVE STRENGTH WAS TESTED ON A 3.6 KM LONG STRETCH OF ROAD. THE SURFACE WAS LEVELLED AND BITUMINOUS EMULSION WAS SPRAYED BEFORE AND AFTER THE BOARDS WERE PLACED IN POSITION. THREE ASPHALTIC GRAVEL COURSES WERE LAID GIVING AN AVERAGE TOTAL THICKNESS OF 12 CM. CONSTRUCTIONAL EXPERIENCES ARE DETAILED AND LEAD TO THE RECOMMENDATION OF 180/200 BITUMEN AT A MINIMUM TEMPERATURE OF 160 DEG C; A PRECUT 5 CM THICK BOARD OF SIZE 120 X 350 CM; PASSAGE OF ROLLER OVER THE BOARD CAUSING CONTACT BETWEEN BOARDS AND THE EXISTING SURFACE; AND AN ASPHALTIC GRAVEL MIX WITH A 180/210 BITUMEN BINDER LAID AT 50 DEG FOLLOWED IMMEDIATELY BY ROLLING. DEFLECTION MEASUREMENTS DO NOT INDICATE SIGNIFICANT DIFFERENCES BEFORE AND AFTER CONSTRUCTION AND BOTH THE TOTAL DEFLECTION AND RADIUS OF CURVATURE ARE WITHIN ACCEPTABLE LIMITS. ECONOMIC AND FUNCTIONAL ADVANTAGES OF THE METHOD AND THE THEORETICAL DISADVANTAGE OF FROST FORMATION ON THE SURFACE DUE TO DIURNAL VARIATION IN TEMPERATURE ARE DISCUSSED.

  • Corporate Authors:

    Royal Norwegian Council for Scientif & Ind Res

    Gaustadalleen 25
    Oslo 3,   Norway 
  • Authors:
    • Hansen, P B
  • Publication Date: 1973-3

Media Info

  • Features: References;
  • Pagination: p. 15-9
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00238134
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 5 1973 12:00AM