STRENGTHENING OF EXISTING BRIDGES USING EPOXY INJECTION

A low viscosity epoxy was pressure injected between portions of the concrete slab and steel stringers of a non-composite highway bridge to determine if the structure could be strengthened by inducing composite action. The slab was jacked off the girders different distances to find an acceptable separation for satisfactory flow of the epoxy. After epoxy injection, the slab was cut into sections which were stripped from the girders. Epoxy did not penetrate between the slab and girder where the slab was not first raised. A 0.8 mm (1/32 in.) shimmed separation was required for flow, and then epoxy covered only 60 percent of the flange surface. Push-off tests of several slab sections showed that the natural bond between the concrete slab and steel girders was greater than the concrete-epoxy-steel connection. It was concluded that the epoxy injection technique shows only marginal promise for strengthening of existing bridges but that the natural bond might be inducing significant composite behavior. /FHWA/

  • Supplemental Notes:
    • Study performed in cooperation with the Department of Transportation, Federal Highway Administration.
  • Corporate Authors:

    University of Georgia, Experiment

    Georgia Experiment Station
    Experiment, GA  USA 

    Georgia Department of Transportation

    One Georgia Center
    600 West Peachtree Street, NW
    Atlanta, GA  USA  30308
  • Authors:
    • Kahn, L F
    • Will, K M
    • Sanders, P H
  • Publication Date: 1979-1

Media Info

  • Pagination: 78 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00303403
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-RD-79-S0906 Final Rpt., FCP 45L3-022
  • Contract Numbers: Project 7702
  • Files: TRIS, STATEDOT
  • Created Date: Jan 30 1980 12:00AM