ON ROAD SURFACES ON AUXILIARY BRIDGES /IN GERMAN/

SINCE TEMPORARY BRIDGES FOR MAINTENANCE OF TRAFFIC WOULD ONLY BE USED FOR HEAVILY USED ROAD STRETCHES, THE SURFACES MUST BE SUITABLE FOR HEAVY TRAFFIC, BUT NEED ONLY HAVE A SERVICE LIFE OF ONE TO TWO YEARS. THEY SHOULD BE FAIRLY FLEXIBLE OWING TO THE MOVABILITY OF CONSTRUCTIONAL COMPONENTS. FROM 1958 TO 1964, DETAILED OBSERVATIONS WERE MADE IN HAMBURG ON SURFACES ON AUXILIARY BRIDGES. THE ORIGINALLY USED THIN SURFACE WITH A MASTIC LAYER OF 1-CM THICKNESS PROVED UNSATISFACTORY, AS ALSO A SURFACE OF SEVERAL LAYERS OF ASPHALT MASTIC. SINCE A SURFACE OF HEATED BITUMINOUS SAND AND GRAVEL APPLIED IN TWO LAYERS TO A DEPTH OF 12-CM ALSO SHOWED SURFACE DEFECTS AFTER A SHORT TIME, IT WAS DECIDED IN 1964 TO CHANGE OVER TO SURFACES OF ASPHALTIC CONCRETE OF 5-CM THICKNESS WITH BINDING LAYERS FIRST IN FOUR - AND THEN IN TWO-LAYER-CONSTRUCTION, FOR THE ROAD FORMATION OF AUXILIARY BRIDGES ERECTED FOR A VERY LARGE BUILDING SITE, AS FOLLOWS: 100 KG/M OF BITUMINOUS CARPETING 8/18, AND 30 KG/M ASPHALTIC CONCRETE 0/5. FINALLY THE RECOMMENDATION IS MADE TO USE WARM-WORKING MIX MATERIALS, SINCE HOT-WORKING MATERIALS ARE REGARDED AS TOO BRITTLE. FG/RRL/

  • Supplemental Notes:
    • Vol 28, No 8, PP 235-241, 9 PHOT
  • Authors:
    • Ascher, G
  • Publication Date: 0

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Filing Info

  • Accession Number: 00211089
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: May 25 1970 12:00AM