IN-SITU EXPANSION JOINT NOSINGS FOR BRIDGES

THE AUTHOR REVIEWS VARIOUS RESIN MORTAR AND CONCRETE NOSINGS FOR EXPANSION JOINTS FOR MEDIUM SPAN BRIDGES. IN SITU NOSINGS CONSTRUCTED FROM THE FOLLOWING MATERIALS ARE CONSIDERED:- EPOXY, POLYESTER & POLYURETHANE RESIN MORTARS, PORTLAND OR HIGH ALUMINA CEMENT REINFORCED WITH STEEL BARS OR FIBRES. CAREFUL SELECTION OF THE RESIN FORMULATION FOR EPOXY RESIN MORTARS OVERCOMES THE DIFFICULTIES WITH THIS METHOD. THE MAJORITY OF FAILURES WERE CAUSED BY THE USE OF FAST CURING RESIN SYSTEMS. POLYESTER RESIN MORTAR IS NOT AFFECTED BY LOW TEMPERATURES BUT IT DOES NOT ADHERE WELL TO DAMP SUBSTRATES AND HAS HAD ONLY LIMITED APPLICATION. POLYURETHANE RESIN MORTAR HAS NOT HAD EXTENSIVE USE. PORTLAND CEMENT OR HIGH ALUMINA CEMENT IS CHEAPER THAN THE RESIN SYSTEMS BUT IT IS MORE SUSCEPTIBLE TO CRACKING UNLESS REINFORCED WITH STEEL BARS OR RANDOM FIBRES. CONCRETE NOSINGS ARE TOLERANT OF ADVERSE WEATHER CONDITIONS BUT ARE UNSUITABLE FOR EMERGENCY REPAIRS. SEVEN CAUSES OF TROUBLES EXPERIENCED WITH EPOXY RESIN MORTAR NOSINGS ARE LISTED. ALTHOUGH IN SITU NOSINGS ARE EXPENSIVE, THEIR USE CAN BE JUSTIFIED IF SUBSEQUENT MAINTENANCE COSTS ARE REDUCED.

  • Corporate Authors:

    Department of the Environment

    Room 1376 Thames House South
    Millbank,   England 
  • Authors:
    • Mander, R F
  • Publication Date: 1974-9

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 31-3
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00083360
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: A
  • Files: ITRD, TRIS
  • Created Date: May 1 1975 12:00AM