ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 9

Mechanisms of Acceleration by Calcium Chloride: A Review

Skalny, J
Senior research scientist, Martin Marietta Laboratories and director, Energy Technology Centermember of ASTM, Martin Marietta Corp., Baltimore, Md.

Maycock, JN
Senior research scientist, Martin Marietta Laboratories and director, Energy Technology Centermember of ASTM, Martin Marietta Corp., Baltimore, Md.

Abstract

Calcium chloride (CaCl₂) is a well-known accelerator of the hydration of concrete. Its activity is very complex, and a meaningful mechanistic interpretation requires an assessment of the effect of CaCl₂ on each of the individual clinker mineral components. This paper reviews the considerable literature associated with hydration acceleration of calcium silicates, aluminates, and ferrites in the presence of CaCl₂. It attempts to cover all of the most meaningful data and observed effects and to relate these effects to various proposed mechanisms. Where appropriate, the reviewed work is critiqued, and suggestions for potentially important new fields of research are offered.

Keywords:
calcium chlorides, accelerating (chemistry), hydration, cements, concretes, clinker, reaction mechanisms

Paper ID: JTE10660J
DOI: 10.1520/JTE10660J
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