PROGRESS REPORT ON THE REACTION OF CALCIUM CHLORIDE ON PORTLAND CEMENT

THE ADDITION OF CALCIUM CHLORIDE APPEARS TO INCREASE THE HEAT CONTRIBUTED AT THE END OF 24 HOURS BY DICALCIUM SILICATE AND TETRACALCIUM FERRO-ALUMINATE AND TO DECREASE THE HEAT FROM TRICALCIUM ALUMINATE PRESENT IN CEMENTS. THE HEAT CONTRIBUTED BY TRICALCIUM SILICATE SHOWS VERY LITTLE CHANGE WHEN CALCIUM CHLORIDE IS ADDED. CALCIUM CHLORIDE INCREASES THE RATE AT WHICH THE HEAT IS EVOLVED FROM ALL CEMENTS TESTED AND IN GENERAL GIVES AN INCREASE OF ABOUT FOUR CALORIES PER GRAM OF CEMENT AT 24 HOURS. IT DECREASED THE TIME OF SET OF THE 11 COMMERCIAL CEMENTS AND INCREASED THE FLOW OF THE CONCRETE MIX AND THE STRENGTH OF RESULTING CONCRETE AT ALL AGES TO 90 DAYS, BEYOND WHICY RESULTS HAVE NOT YET BEEN OBTAINED. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/13/13-018.pdf
• Supplemental Notes:
  • Vol 13, ParT I, PP 291-299, 4 FIG, 2 TAB. 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:
  • Rapp, P
  • Wells, L S
• Publication Date: 1934

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Thirteenth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 7-8, 1933. Part I: Reports of Research Committees and Papers
• Serial:
  • Highway Research Board Proceedings
  • Volume: 13
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Admixtures; Calcium chloride; Concrete; Concrete curing; Flow; Heat; Portland cement
• Old TRIS Terms: Reaction
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00213763
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 15 1971 12:00AM