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 Corrosion Resistance Evaluation And Assessment Field Tests Galvanized Metals Laboratory Tests Reinforcing Bars Service Life
• 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:392ae3332242d35ba735adfe89b5b2df0fedaacd50c9e2904edaa3df85bc60ec
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29076/dot_29076_DS1.pdf
• File Type:
  [PDF - 9.09 MB ]