SERVICE LIFE EVALUATION OF CONCRETE SURFACE COATINGS

The use of surface coatings for concrete bridge substructures is one of the methods used as corrosion protection. The results of a 1-year laboratory study on three generic coatings, epoxy, urethane, and methyl methacrylate (MMA), are presented. Specimens were built to simulate four exposure conditions typical for concrete bridges located in the coastal region or inland where deicing salts are used. The exposure conditions were horizontal surface, vertical surface, tidal zone, and immersion zone. The service life of each coating was estimated on the basis of chloride ion diffusion through the coating and concrete. The diffusion equation for the condition that the surface chloride concentration changes as a function of the square root of time was used to estimate the service lives of the coatings for various component exposure conditions and the range of environmental exposure conditions in the United States.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 67-74
  • Monograph Title: Management and maintenance of bridge structures
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00714816
  • Record Type: Publication
  • ISBN: 0309061547
  • Files: TRIS, TRB
  • Created Date: Nov 30 1995 12:00AM