Synthesis of Information Related to Highway Practices. Topic 55-01. State DOT Use and Policies on Implementation of Corrosion Resistant Reinforcing Bars

Throughout the United States there is widespread use of deicing chemicals during the winter months to prevent the buildup of snow and ice on roadway surfaces and bridge deck slabs. While deployment of deicing chemicals is an effective strategy for maintaining safe, reliable, ice-free roadway surfaces, this practice can lead to chloride contamination in bridge components, including decks, parapets, sidewalks, headers, backwalls, and bridge seats. Bridge components can also be subject to natural sources of chloride, particularly in coastal environments where they may be exposed to seawater, spray, and mist. Chlorides migrate through the concrete cover and become concentrated at critical levels. As a result, corrosion of the reinforcement is initiated. This results in concrete spalls, costly repairs, and eventually replacement of bridge components. To meet this challenge, we can design and construct bridges using corrosion resistant reinforcing bars, which will delay the onset of corrosion and the subsequent deterioration of bridge decks and other structural elements. Additionally, more corrosion resistant reinforcing bars can be utilized versus typical corrosion resistant reinforcing bars. Material producers have been meeting this challenge by developing more corrosion resistant reinforcing bars with different coatings, with different steel compositions, and by employing other alternate materials. The objective of this synthesis is to document practices used by state departments of transportation (DOTs) related to the use of corrosion resistant reinforcing bars.

• Record URL:
  http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=5468
• Supplemental Notes:
  • Contract to a Performing Organization has not yet been awarded.

Language

• English

Project

• Status: Proposed
• Funding: $55000
• Contract Numbers:

  Project 20-05, Topic 55-01

• Sponsor Organizations:

  National Cooperative Highway Research Program (NCHRP) Synthesis

  Transportation Research Board
  500 Fifth Street, NW
  Washington, DC    20001

  American Association of State Highway and Transportation Officials (AASHTO)

  444 North Capitol Street, NW
  Washington, DC  United States  20001

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Project Managers:

  Larson, Sandra

• Start Date: 20230912
• Expected Completion Date: 0
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Bridge decks; Chlorides; Corrosion resistance; Deicing chemicals; Highways; Reinforcing bars; State departments of transportation; State of the practice
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; Materials;

Filing Info

• Accession Number: 01884673
• Record Type: Research project
• Source Agency: Transportation Research Board
• Contract Numbers: Project 20-05, Topic 55-01
• Files: TRB, RIP
• Created Date: Jun 6 2023 5:02PM