FIELD AND LABORATORY EVALUATION OF SILICA FUME MODIFIED CONCRETE BRIDGE DECK OVERLAYS IN OHIO

The objective of this study was to evaluate, under field and laboratory conditions, the properties of silica fume modified concrete (SFMC) mixes that are currently used by the Ohio Department of Transportation (ODOT) for bridge deck overlays. These mixes have been used with increasing frequency for overlays in Ohio since 1984. The research methods included construction monitoring of nine overlay placement projects, field evaluations of existing overlaid decks, and preparation and testing of laboratory SFMC mixes using materials obtained from the construction monitoring projects. The field evaluations consisted of visual inspections of 145 decks, and in-depth condition surveys of 28 decks to determine the extent of any delamination/debonding and to obtain core samples for laboratory testing. Based on the information collected in this study, it was concluded that the early performance of SFMC overlays in Ohio has generally been very good. None of the examined overlays, which ranged in age from one to six years, exhibited spalling or patching. The most frequently observed distress was cracking of the overlay, which was observed on approximately 19% of the overlays that were visually inspected. The cracking was considered to be the result of drying shrinkage in most cases. The results of laboratory testing indicated that the SFMC mixes show low permeabilities and very high compressive strengths. Recommendations are provided regarding the mix design and construction specifications, with the intent being to reduce the potential for drying shrinkage.

  • Corporate Authors:

    CTL Engineering, Incorporated

    2860 Fisher Road
    Columbus, OH  United States  43204

    Ohio Department of Transportation

    25 South Front Street
    Columbus, OH  United States  43215

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Abdulshafi, O A
    • Fitch, M G
  • Publication Date: 1995-7

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 245 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00725542
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/OH-95/027, Final Report
  • Contract Numbers: State Job 14508(0)
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Sep 9 1996 12:00AM