Rational Approach for Replacement of Conventional Reinforcement with Macro-Synthetic Fibers in Bridge Deck Overlays

With the increasing use and acceptance of macro-synthetic fibers as a viable and economical reinforcing alternative to conventional steel reinforcement it is important to have a rational approach when designing fiber reinforced concrete mixtures to replace shrinkage and temperature reinforcement in concrete. In applications such as bridge decks and pavement overlays, steel reinforcement is typically specified based on the tensile capacity required to resist tensile forces generated by restrained shrinkage stresses. A rational approach to designing fiber reinforced concrete for this type of application is presented. The added value of increased durability, through reduced permeability and decreased shrinkage cracking is also discussed. Case studies of structures rehabilitated using fiber reinforced concrete overlays designed using this approach will be presented. These structures, located throughout the US and Canada, were each designed to provide fiber reinforced concrete with equivalent tensile capacity to the specified shrinkage and temperature cracking control reinforcement. Quality control testing procedures that were implemented on each structure to verify adequate postcrack tensile capacity will also be presented. In general, properly designed synthetic macro-fiber reinforced concrete has been shown to be an economical reinforcing alternative that increases speed of construction and decreases the susceptibility of concrete to shrinkage cracking without sacrificing aesthetics or ride quality.

  • Corporate Authors:

    Federal Highway Administration

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

    National Concrete Bridge Council

    Portland Cement Association, 5420 Old Orchard Road
    Skokie, IL  United States  60077-1083

    Missouri Department of Transportation

    105 West Capitol Avenue
    Jefferson City, MO  United States  65102

    American Concrete Institute (ACI)

    38800 Country Club Drive
    Farmington Hills, MI  United States  48331
  • Authors:
    • Mahoney, Michael A
    • Forgeron, Dean P
  • Conference:
  • Publication Date: 2008

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Photos; References;
  • Pagination: 10p
  • Monograph Title: HPC: Safe, Affordable, and Efficient

Subject/Index Terms

Filing Info

  • Accession Number: 01105250
  • Record Type: Publication
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jul 25 2008 11:06AM