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).

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1976/564/564-002.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=USE+OF+ADMIXTURES+IN+CONCRETE+PLACED+AT+HIGH+TEMPERATURES&author=K.+Daugherty&author=M.+Kowalewski&publication_year=1976
• Availability:
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Chemical Additions and Admixtures for Concrete. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Daugherty, Kenneth E
  • Kowalewski Jr, Milton J
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1976

Media Info

• Media Type: Print
• Features: Tables;
• Pagination: pp 10-21
• Monograph Title: Concrete Admixtures
• Serial:
  • Transportation Research Record
  • Issue Number: 564
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Admixtures; Chemical retarders; Concrete placing; Concrete setting; High temperature; Ice; Workability
• Uncontrolled Terms: Setting time
• Subject Areas: Highways; Materials;

Filing Info

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