Synthesis of Information Related to Highway Problems. Topic 39-03. Cathodic Protection for Life Extension of Existing Reinforced Concrete Bridge Elements

<strong><p class="MsoNormal" style="MARGIN: 0in 0in 0pt; LINE-HEIGHT: 150%" align="left"><span style="COLOR: black"><font size="3"><font face="Times New Roman">Cathodic protection (CP) was first used on bridge decks in the 1970's and on bridge substructures in the 1980's. Since then, it has been employed by a number of state departments of transportation (DOTs) on bridges that experienced reinforcing steel corrosion due to deicing salts or marine exposure (or both). <span style="mso-spacerun: yes"> </span>While earlier cathodic protection installations on bridges were of the impressed current type, significant advances have been made in the past decade in adapting galvanic systems, which are simpler and more easily maintained, for substructures in particular.<span style="mso-spacerun: yes">  </span>Results, however, have been mixed, with some states employing cathodic protection extensively and others only on a limited basis or not at all. </font></font></span><span style="COLOR: black"><font size="3"><font face="Times New Roman">The widely differing levels of usage may be due to such factors as 1) Initial and ongoing costs; 2) the technology, including design, installation, and maintenance is not understood by many highway personnel; 3) instances of inadequate performance; 4) the absence of a protocol for deciding when to use cathodic protection, considering factors such as type of structural element, nature of exposure, extent of corrosion-induced damage in concrete, desired service life, etc; and 5) the wide array and evolution of materials and instrumentation available in the marketplace. </font></font></span><span style="COLOR: black"><font size="3"><font face="Times New Roman">A synthesis is needed to examine the utility of cathodic protection for control of reinforcing steel corrosion and extension of bridge service life.<span style="mso-spacerun: yes"> </span>The main focus of the study is determination of why states do or do not use CP. </font></font></span></p></strong>

Language

  • English

Project

  • Status: Completed
  • Funding: $30000.00
  • Contract Numbers:

    Project 20-05, Topic

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

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

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Williams, Jon

  • Performing Organizations:

    Concorr, Incorporated

    Herndon, VA  United States  00000-
  • Principal Investigators:

    Sohanghpurwala, Ali Akbar

  • Start Date: 20071015
  • Expected Completion Date: 0
  • Actual Completion Date: 0
  • Source Data: RiP Project 16908

Subject/Index Terms

Filing Info

  • Accession Number: 01464572
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 20-05, Topic
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 2:45PM