THE EFFECT OF HOT CEMENT ON TIME OF SET AND WORKABILITY OF CONCRETE

UNDER CERTAIN CONDITIONS CEMENT RECEIVED ON THE WORK RETAINS CONSIDERABLE AMOUNTS OF THE HEAT GENERATED DURING MANUFACTURE. OCCASIONAL TEMPERATURES AS HIGH AS 150 TO 200 F HAVE BEEN NOTED. THE PURPOSE IS TO ASCERTAIN WHAT EFFECT THIS HEAT HAS UPON THE SETTING TIME OF THE CEMENT AND THE WORKABILITY OF THE CONCRETE IN HIGHWAY WORK. THE REPORT INCLUDES THE COMPARATIVE SETTING TIME OF AT LEAST FOUR DIFFERENT CEMENTS AT TEMPERATURES OF 70, 100, 150, AND 200 F, MIXED WITH WATER AT 70, 100, AND 150 F. THE SET IS RECORDED AT TWENTY-FIVE MINUTES, FORTY-FIVE MINUTES, AND AT TEN MINUTE INTERVALS, THEREAFTER, UNTIL INITIAL SET IS ATTAINED. IN ORDER TO SIMULATE SEVERE FIELD CONDITIONS THE SPECIMENS WERE STORED IN AIR AT 100 F, WITH CONTROLLED HUMIDITY OF FORM FROM FORTY-FIVE TO FIFTY PERCENT. TESTS OF THE WORKABILITY OF CONCRETE MADE WITH CEMENT AND WATER AT THE SAME TEMPERATURES AS IN THE SETTING TESTS ARE ALSO REPORTED. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/11/11-012.pdf
• Supplemental Notes:
  • Vol 11, Pt 1, PP 218-227, 9 FIG; part of Report of Committee on Materials and Construction. 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:
  • Mattimore, H S
  • Miesenhelder, P D
  • Klein, W H
  • Gage, R B
  • Bauman, E W
  • Mills, W H
• Discussers:
  • PAUL, I
• Publication Date: 1932

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Eleventh Annual Meeting of the Highway Research Board Held at Washington, D.C. December 10-11, 1931. Part I: Reports of Research Committees and Papers
• Serial:
  • Highway Research Board Proceedings
  • Volume: 11
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Cement; Concrete curing; Humidity; Temperature; Water; Workability
• Subject Areas: Construction; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00215302
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jun 1 1971 12:00AM