A FIELD INVESTIGATION OF A CONCRETE OVERLAY CONTAINING SILICA FUME ON ROUTE 50 OVER OPEQUON CREEK. FINAL REPORT

This study evaluated concretes containing silica fume for use in overlays as a suitable alternative to the widely used latex-modified concrete (LMC). A two-lane, four-span bridge deck was overlaid with concrete containing silica fume at 7% or 10% by mass of the portland cement as an additional cementitious material. The results of laboratory tests on field concretes containing silica fume were satisfactory. Silica fume concrete (SFC) bonds well with the base concrete and has very low permeability, high strength, and satisfactory freeze-thaw resistance. In the field, over the 5-year evaluaiton period, cracking and increases in half-cell potentials and chloride content indicated a tendency to corrosion. However, such increases are also evidenced with LMC overlays. Thus, the results indicate that SFC can be effectively used in thin overlays as an alternative to LMC. SFC, as LMC, is prone to plastic shrinkage; therefore, immediate and proper curing must be provided to avoid the shrinkage cracking that can occur under adverse curing conditions.

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• Record URL:
  https://rosap.ntl.bts.gov/view/dot/19328
• Corporate Authors:

  Virginia Transportation Research Council

  530 Edgemont Road
  Charlottesville, VA  United States  22903

  Virginia Department of Transportation

  1401 East Broad Street
  Richmond, VA  United States  23219

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Ozyildirim, C
• Publication Date: 1993-2

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 20 p.

Subject/Index Terms

• TRT Terms: Bond strength (Materials); Bonding; Bridge decks; Chlorides; Compressive strength; Concrete; Concrete curing; Concrete overlays; Cracking; Freeze thaw durability; Laboratory tests; Permeability; Shrinkage; Silica fume
• Uncontrolled Terms: Concrete cracking
• Old TRIS Terms: Concrete shrinkage
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 00627069
• Record Type: Publication
• Report/Paper Numbers: FHWA/VA-93-R15, VTRC 93-R15
• Contract Numbers: 2855-010-940
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Mar 11 1996 12:00AM