EFFECTS OF CALCIUM CHLORIDE ON CONCRETE

COMPRESSIVE AND FLEXURAL STRENGTHS OF SPECIMENS CURED WITH INTEGRAL OR SURFACE CALCIUM CHLORIDE AT TEMPERATURES OF 100 DEG. F. AND 25 TO 35 PERCENT RELATIVE HUMIDITY WERE OF THE SAME ORDER AS THOSE OF SPECIMENS SUBJECTED TO 3 DAYS OF WET BURLAP CURING STORED UNDER THE SAME CONDITIONS. ALSO, UNDER SIMILAR CONDITIONS, SPECIMENS TREATED WITH SURFACE APPLICATIONS OF CALCIUM CHLORIDE AFTER OVER-NIGHT WET BURLAP TREATMENT EXHIBITED GREATER WEAR RESISTANCE AT 28 DAYS OF AGE THAN SPECIMENS CURED WITH WET BURLAP. OBSERVATIONS OF THE EFFECTS OF CALCIUM CHLORIDE AND WATER GAIN ON THE CORROSION OF REINFORCING STEEL SHOWED SLIGHT RUST DEPOSITS AT EARLY AGES WHENEVER CALCIUM CHLORIDE WAS USED IN THE HIGHER SLUMP CONCRETES SHOWING EXCESSIVE WATER GAIN. SPECIMENS EXAMINED AT THE AGE OF ONE YEAR INDICATED THAT THIS CORROSION WAS NOT PROGRESSIVE. THE VOID SPACE ADJACENT TO STEEL CREATED BY EXCESSIVE WATER GAIN WAS FOUND TO BE CONDUCIVE TO CORROSION. WHEN PLAIN CONCRETE WAS USED, THIS CORROSION WAS MILD; WHEN CONCRETE CONTAINING CALCIUM CHLORIDE WAS USED, THE CORROSION WAS SLIGHTLY GREATER. WHERE CONCRETE WAS IN INTIMATE CONTACT WITH THE STEEL, NO CORROSION OCCURRED, REGARDLESS OF WHETHER PLAIN CONCRETE OR CONCRETE CONTAINING CALCIUM CHLORIDE WAS USED. /AUTHOR/

• Record URL:
  • https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/27/27-019.pdf
• Supplemental Notes:
  • Vol 27, pp 189 - 196, 4 FIG, 5 TAB, 11 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:
  • Vollmer, H C
• Publication Date: 1948

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Twenty-Seventh Annual Meeting of the Highway Research Board Held at Washington, D.C. December 2-5, 1947
• Serial:
  • Highway Research Board Proceedings
  • Volume: 27
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Burlap; Calcium chloride; Compressive strength; Concrete; Concrete curing; Concrete tests; Consistency; Corrosion; Durability; Flexural strength; Reinforcing steel; Water; Wetting
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213934
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jul 2 1971 12:00AM