USE OF SUPPLEMENTAL CEMENTITIOUS MATERIALS FOR OPTIMUM RESISTANCE OF CONCRETE TO CHLORIDE PENETRATION. FINAL REPORT

This study was conducted to determine whether significant improvements could be achieved in the resistance to the penetration by chloride ions of concretes with fly ash or slag by the addition of silica fume with either Thpe II or Type III cement and whether early strengths of concretes with fly ash or slag could be improved by the addition of silica fume. The chloride permeability was estimated by means of AASHTO Test Method T 277. The results show that lower permeability is attained by the addition of silica fume in amounts equal to 5 percent of the cementitious material in both fly ash and slag concretes. There were significant differences between results for specimens moist cured 1 day and 14 days, but with specimens made with Type III cement, even the 1-day moist curing provided low chloride permeability. Silica fume also increased the strength of similar concretes to some degree, but generally, this increase was not large. Except for those specimens containing slag, 1-day strengths higher than 3000 psi are obtainable with a water-to-cementitious-material ratio (w/c) of 0.40 with all of the concretes tested with Type III cement as well as control concretes with Type II cement. Concretes with slag and silica fume reached compressive strengths of 3000 psi in a little more than 2 days.

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• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/19229
• 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
  • Halstead, W J
• Publication Date: 1989-2

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 32 p.

Subject/Index Terms

• TRT Terms: Cement; Chlorides; Compressive strength; Concrete; Concrete tests; Fly ash; Improvements; Penetration resistance; Permeability; Silica fume; Slag; Strength of materials; Water cement ratio
• Uncontrolled Terms: Concrete strength
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00485732
• Record Type: Publication
• Report/Paper Numbers: FHWA/VA-89-R20, VTRC 89-R20
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Jul 31 1990 12:00AM