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Re-evaluation of standard mortar bar and concrete prism tests for alkali-aggregate reactivity

From National Research Council Canada

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  1. National Research Council of Canada
FormatText, Article
SubjectMortar; Concrete; concrete admixtures; bases (chemistry); chemical tests; petrography; standard tests; standards; petrographic examination recommendation; ASTM, CSA tests
Abstract
The effectiveness of the mortar bar ASTM C227 and concrete prism CSA A23.2-14A tests for evaluating the potential alkali-aggregate reactivity of classical alkali-silica, late expansive siliceous and alkali-carbonate aggregates is discussed. It is emphasized that petrographic examination is an essential preliminary step in the evaluation of potential alkali reactivity of all aggregates. The expansion limits set to differentiate between deleteriously expansive and innocuous cement-aggregate combinations by ASTM, CSA, U.S. Corps of Engineers, U.S. Bureau of Reclamation and by the author are evaluated for use with classical alkali-silica, late-expanding siliceous and alkali- carbonate reactive aggregates.
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  • Materials and Structures 16, no. 94 (1983): 243–250.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-P-1140
NRC numberNRCC 22703
NRC-IRC-2100
NPARC number20374139
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Record identifiercc075d20-f8bd-45c2-8087-19a74669a177
Record created2012-07-23
Record modified2024-03-22
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