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Interaction of concrete aggregates and Portland cement: situation in Canada

From National Research Council Canada

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FormatText, Article
SubjectConcrete; concrete admixtures; Portland cement; bases (chemistry); expansion; crackings (breaking); North America; concrete aggregates; Portland cement; alkalis; rock types
Abstract
Certain rock types, used as aggregate, react with alkalis in Portland cement to produce expansion and cracking of concrete. In Canada, several investigations of field problems have indicated a much wider occurrence of the phenomenon than was formerly thought to be the case. There are at least two different types of reaction involved. Methods of determining potential alkali-expansivity of concrete aggregate have been well developed and preventive measures have been established that are being used successfully in the field. The extra cost involved is relatively small and, in terms of added life to concrete, may be considered negligible. This paper is a brief review of the present situation in Canada.
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  • Engineering Journal 55, no. 5: 34–39.
LanguageEnglish
Peer reviewedNo
IdentifierDBR-TP-375
NRC numberNRCC 12715
NRC-IRC-2655
NPARC number20374804
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Record identifiere8342e6b-1863-44f1-b204-795eaa05e49c
Record created2012-07-23
Record modified2023-01-26
Date modified: