NEW DECK FOR OLD

A four-lane suspension bridge in Nova Scotia has just undergone a major refurbishment project to waterproof the road deck. Water and de-icing salts were entering through the epoxy asphalt surfacing to the deck, causing significant corrosion. Several competing waterproofing systems were tested in the laboratory and on-site. The test included extensive freeze-thaw cycles, heat cycling, fatigue and bond strengths. A fast-curing, seamless, spray-applied waterproofing membrane based on methyl methacrylate resins was chosen because of its performance under the testing and its proven track record on other bridges. The bridge was refurbished one lane at a time and was completed in about three months. First, the steel decks were blasted and a zinc phosphate reactive methyl methacrylate primer was applied. Transverse and longitudinal splice plates were stripe coated with the waterproofing membrane. The membrane was applied in two coats; while the second coat was still in a liquid state, aggregate scatter was broadcast into the membrane. Finally, a polymer-modified bitumen tack coat was applied to provide a strong bond between the waterproofing membrane and the subsequent surfacing.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/25073860
• Corporate Authors:

  Route One Publishing Limited

  19/21 High Street
  Sutton, Surrey SM1 1DJ,   England 
• Publication Date: 2001-11

Language

• English

Media Info

• Features: Photos;
• Pagination: p. 102
• Serial:
  • World Highways/Routes du Monde
  • Volume: 10
  • Issue Number: 9
  • Publisher: Route One Publishing Limited
  • ISSN: 0964-4598
  • Serial URL: http://www.worldhighways.com

Subject/Index Terms

• TRT Terms: Adhesive bond strength; Asphalt; Blast cleaning; Bridge decks; Case studies; Corrosion protection; Deicing chemicals; Fatigue strength; Freeze thaw tests; Heat cycle; Impervious membranes; Membrane curing; Methyl methacrylate; Primers; Splice plates; Surfacing; Suspension bridges; Tack coats; Waterproofing materials
• Geographic Terms: Nova Scotia
• Subject Areas: Geotechnology; Highways; Maintenance and Preservation; Materials; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00823528
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 12 2002 12:00AM