THE ROLE OF CALCIUM CHLORIDE IN CONCRETE

Calcium chloride offers many advantages as a concrete accelerator, but evidence has accumulated recently which shows that it can cause serious corrosion problems in reinforced concrete structures. It reduces setting time, reduces the rate of settlement (or bleeding), substnatially increases early compressive strengths and sometime causes modest increases in compressive strength as late as several years after placement. On the other hand, recent post-mortem studies of distressed concretes imply that exposed reinforced concrete made with chloride admixtures may eventually be subject to failure. An especially dangerous condition is created by the practice of varying the calcium chloride content of the concrete of a single structure because of changes in ambient temperatures. For example, the cast-in-place reinforced columns of a multistory building exposed to midwest conditions and constructed with a variable chloride content (0 to 1.5 percent), after 3 years exhibited cracking over and in line with the reinforcing stell only in the chloride-containing portions of the columns. /HRSI/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/05490219
• Corporate Authors:

  Concrete Construction Publications, Incorporated

  P.O. Box 321
  Addison, IL  United States  60101
• Authors:
  • Erlin, B
  • Hime, W G
• Publication Date: 1976-2

Media Info

• Features: Figures; Tables;
• Pagination: p. 57-61
• Serial:
  • CONCRETE CONSTRUCTION
  • Volume: 21
  • Issue Number: 2
  • Publisher: CEMENT & CONCRETE ASSOCIATION OF NEW ZEALAND
  • ISSN: 0549-0219

Subject/Index Terms

• TRT Terms: Admixtures; Calcium chloride; Chloride content; Compressive strength; Concrete; Concrete setting; Corrosion; Cracking; Durability; Failure; Portland cement concrete; Reinforced concrete; Spalling
• Uncontrolled Terms: Concrete cracking; Setting time
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00129624
• Record Type: Publication
• Files: TRIS
• Created Date: May 14 1976 12:00AM