EFFECT OF CALCIUM CHLORIDE ON PORTLAND CEMENTS AND CONCRETES

THE ADDITION OF CALCIUM CHLORIDE TO PORTLAND CEMENTS AND CONCRETES APPEARS TO INCREASE THE HEAT CONTRIBUTED AT THE END OF 24 HOURS BY DICALCIUM SILICATE AND TETRACALCIUM ALUMINO-FERRITE AND TO DECREASE THE HEAT CONTRIBUTED TO TRICALCIUM ALUMINATE. CALCIUM CHLORIDE HAS LITTLE EFFECT ON THE HEAT CONTRIBUTED BY TRICALCIUM SILICATE. CALCIUM CHLORIDE INCREASES THE RATE AT WHICH THE HEAT IS EVOLVED FROM ALL CEMENTS. THE STRENGTH CONTRIBUTED BY THE TWO SILICATE COMPOUNDS IN CEMENT WERE INCREASED AND THE STRENGTH CONTRIBUTED BY TRICALCIUM ALUMINATE WAS DECREASED BY THE ADDITION OF CALCIUM CHLORIDE. CALCIUM CHLORIDE DECREASED THE TIME OF SET OF ELEVEN COMMERCIAL CEMENTS AND INCREASED THE FLOW AND THE STRENGTH OF THE RESULTING CONCRETE. THE PHYSICAL PROPERTIES OF THE EXPERIMENTAL CEMENTS WERE SIMILARLY AFFECTED BY THE ADDITION OF CALCIUM CHLORIDE. THE OPTIMUM AMOUNTS TO BE ADDED FOR DIFFERENT TYPES OF CEMENT AND AT VARIOUS CURING TEMPERATURES ARE INDICATED. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/14/14P1-015.pdf
• Supplemental Notes:
  • No 14, Part I, PP 341-381, 13 FIG, 8 TAB, 16 REF. 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
• Publication Date: 1935

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Fourteenth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 6-7, 1934. Part I
• Serial:
  • Highway Research Board Proceedings
  • Volume: 14
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Aluminates; Calcium chloride; Concrete; Concrete curing; Heat; Portland cement; Portland cement concrete; Setting (Concrete); Silicates; Strength of materials; Temperature
• Uncontrolled Terms: Setting time
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00212690
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: May 13 1994 12:00AM