Iowa state highway 92 over drainage ditch #25 : performance evaluation - galvanized reinforcing bars, Louisa County, Iowa.

Details

• Corporate Creators:
  Wiss, Janney, Elstner, and Associates
• Subject/TRT Terms:
  • Bridge decks
  • Concrete bridges
  • Galvanized metals
  • Reinforcing bars
  • Evaluation and assessment
  • Field tests
  • Laboratory tests
  • Service life
  • Corrosion resistance
• Publication/ Report Number:
  WJE No. 2012.5759
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Corporate Publisher:
  Iowa. Dept. of Transportation. Office of Bridges and Structures
• Abstract:
  Several strategies are available to the Iowa Department of Transportation (IaDOT) for limiting ; deterioration due to chloride-induced corrosion of embedded reinforcing bars in concrete bridge decks. ; While the method most commonly used throughout the Midwestern United States is to construct concrete ; bridge decks with fusion-bonded epoxy-coated reinforcing bars, galvanized reinforcing bars are an ; available alternative. Previous studies of the in situ performance of galvanized reinforcing bars in service ; in bridge decks have been limited. IaDOT requested that Wiss, Janney, Elstner Associates, Inc. (WJE) ; perform this study to gain further understanding of the long-term performance of an Iowa bridge deck ; reinforced with galvanized reinforcing bars. ; This study characterized the condition of a bridge deck with galvanized reinforcing bars after about 36 ; years of service and compared that performance to the expected performance of epoxy-coated or uncoated ; reinforcing bars in similar bridge construction. For this study, IaDOT selected the Iowa State Highway 92 ; bridge across Drainage Ditch #25 in Louisa County, Iowa (Structure No. 5854.5S092), which was ; constructed using galvanized reinforcing bars as the main deck reinforcing. The scope of work for this ; study included: field assessment, testing, and sampling; laboratory testing and analysis; analysis of ; findings; service life modeling; and preparation of this report. In addition, supplemental observations of ; the condition of the galvanized reinforcing bars were made during a subsequent project to repair the bride ; deck.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29076/dot_29076_DS1.pdf
• File Type:
  [PDF - 9.09 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:392ae3332242d35ba735adfe89b5b2df0fedaacd50c9e2904edaa3df85bc60ec