RESULTS OF BRIDGE DECK CONDITION SURVEYS AND CORROSION RATE DETERMINATION

Twenty bridge decks are being observed to determine the behavior and probable service lives of concrete bridge decks with waterproofing systems where the free chloride-ion content was two or more lbs per cu yd at the top mat of reinforcement when the waterproofing was constructed. Fifteen of the decks had 40 percent or more of the top mat reinforcement actively corroding according to copper-copper sulphate half-cell measurements. The other five decks had 5 percent to 40 percent of the top mat of reinforcement actively corroding. Initial postconstruction survey results show that the waterproofing system used gives good initial protection from moisture penetration from the surface, and that 83 percent of the study decks contain delaminations. Nearly all delaminations found after construction were small in size and tended to be located within the same area as delaminations found during preconstruction surveys. Corrosion rates tended to decrease after the waterproofing system had been completed.

  • Corporate Authors:

    Illinois Department of Transportation

    Bureau of Materials and Physical Research
    126 East Ash Street
    Springfield, IL  United States  62704-4766

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • LaCroix, J E
  • Publication Date: 1979-6

Media Info

  • Pagination: 27 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00313128
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-IL-PR-80-086
  • Files: NTIS, TRIS, USDOT, STATEDOT
  • Created Date: May 7 2002 12:00AM