Slump Loss ans Retempering of Superplasticized Concrete

The influence of mix design and material selection on the slump gain and subsequent loss of superplasticized (flowing) concrete was studied. It was determined that the dose of the superplasticizer was the most critical factor and the optimum amount depends on both the admixture type and cement type. An overdose of admixture can lead to severe segregation and bleeding. Suggestions are given for developing superplasticized concretes that will maintain high workabilities until the time of placement without desirable bleeding. Superplasticized concretes can be satisfactorily air-entrained. Some adjustments may be needed for loss of air after superplasticizing, bit if the final air content is within the usual recommended range then the concrete should be frost-resistant.

• Corporate Authors:

  University of Illinois, Urbana-Champaign

  Department of Civil and Environmental Engineering
  205 North Mathews Avenue
  Urbana, IL  United States  61801-2352

  Illinois Department of Transportation

  Bureau of Materials and Physical Research
  126 East Ash Street
  Springfield, IL  United States  62704-4766

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Young, J F
• Publication Date: 1983-3

Language

• English

Media Info

• Media Type: Print
• Edition: Final Report
• Features: Figures; References; Tables;
• Pagination: 23p

Subject/Index Terms

• TRT Terms: Admixtures; Aggregate segregation; Bleeding (Pavements); Freeze thaw durability; Mix design; Portland cement concrete; Superplasticizers
• Uncontrolled Terms: Slump loss
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01353885
• Record Type: Publication
• Report/Paper Numbers: FHWA/IL/UI-200, UILU-ENG-83-2006
• Contract Numbers: IHR-412
• Files: TRIS, USDOT, STATEDOT
• Created Date: Oct 19 2011 12:52PM