Benefits of Chemical Admixtures in HPC

This paper describes how chemical admixtures have been incorporated into concrete mix proportions for many years in order to attain performance properties. Most high performance concrete (HPC) mixes contain at least one type of chemical admixture. In girder construction, high compressive strength is the property frequently required. For concrete compressive strengths above 5000 psi (34 MPa), chemical admixtures are usually necessary to achieve a cost-effective mix. In bridge decks, low chloride permeability is required. Chemical admixtures are used to facilitate placing and finishing. AASHTO M 194 (ASTM C 494) classifies the most commonly used chemical admixtures as Types A through G, based on the admixture’s effect on lowering water demand or influencing setting time.

• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  National Concrete Bridge Council

  Portland Cement Association, 5420 Old Orchard Road
  Skokie, IL  United States  60077-1083
• Authors:
  • Caldarone, Michael A
• Publication Date: 2005

Language

• English

Media Info

• Media Type: Print
• Pagination: 1p
• Monograph Title: HPC Bridge Views
• Serial:
  • HPC Bridge Views
  • Issue Number: Issues 1-38
  • Publisher: National Concrete Bridge Council
  • Serial URL: http://www.hpcbridgeviews.org

Subject/Index Terms

• TRT Terms: Admixtures; Bridge decks; Chemical properties; Compressive strength; Concrete curing; Cost effectiveness; Girder bridges; Girders; High performance concrete
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01111219
• Record Type: Publication
• Files: TRIS, USDOT
• Created Date: Sep 24 2008 10:39AM