STEAM PRESSURE RELIEF AND DRAINAGE OF PERCOLATING WATER AND CONDENSATION WATER FROM BENEATH BITUMINOUS BRIDGE SURFACINGS

THE BASECOURSE AND WEARING COURSE WHICH FORM THE BRIDGE SURFACING USUALLY REST ON AN INSULATION COURSE OF MASTIC ASPHALT, GUSSASPHALT, METAL OR PLASTIC FOILS, WATERPROOFING LAYERS ETC. BELOW THIS SHOULD BE A SEPARATING LAYER TO FACILITATE STEAM PRESSURE RELIEF, MADE OF OILED PAPER, GLASS WOOL OR A GLASS-BITUMEN MIXTURE. THE DANGER OF FROST-HEAVE AND BLISTERING EXISTS WHEN WATER PENETRATES THROUGH FINE CRACKS IN THE SURFACING AND THROUGH THE INSULATING COURSE, OR STEAM PRESSURE ARISES BECAUSE OF A CHANGE IN TEMPERATURE BELOW THE SURFACING. THIS MAY RESULT IN DAMAGE TO THE STRUCTURE. THE AUTHOR PROPOSES THE INCORPORATION OF TUBES INTO NEW BRIDGES WHICH WOULD CONDUCT AWAY THE STEAM. THESE WOULD BE MAINLY MADE OF PLASTIC. THE LATER INCORPORATION OF THE TUBES INTO EXISTING BRIDGES IS ALSO POSSIBLE BY MEANS OF A DRILLING TECHNIQUE. /TRRL/

  • Corporate Authors:

    Schweizerische Bauzeitung /Switz

    ,    
  • Authors:
    • Honegger, H
  • Publication Date: 1972

Media Info

  • Features: Figures; References;
  • Pagination: p. 19-22
  • Serial:
    • Volume: 90
    • Issue Number: 2

Subject/Index Terms

Filing Info

  • Accession Number: 00210190
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Nov 18 1973 12:00AM