USE OF ADMIXTURES IN CONCRETE PLACED AT HIGH TEMPERATURES

The difficulty posed by the high temperatures of concrete batches in areas such as the southwest United States limits the use of concrete. High temperatures and subsequent hot materials are present in the concrete mixers and the concrete poured. This high-temperature condition shortens the setting time and workability time of the concrete. Ice, which can be added to the mixer to reduce the temperature, is costly and sometimes not readily available at the job site. It is possible to lengthen the setting time and workability time by the addition of water-reducing, set-retarding chemical admixtures. This study attempts to determine by cement paste and concrete studies the best commercial and laboratory type of admixtures available for white and gray cement concretes. Thirty admixtures at normal and above-normal concentrations were tried in the paste systems, and the best retarders were tested subsequently in concrete batches. The temperature range used in this study varied from 70 to 110 F (21.1 to 43.3 C).

Media Info

  • Media Type: Print
  • Features: Tables;
  • Pagination: pp 10-21
  • Monograph Title: Concrete admixtures
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00135023
  • Record Type: Publication
  • ISBN: 0309024749
  • Files: TRIS, TRB
  • Created Date: Jul 13 1976 12:00AM