Evaluation of miniature rock prism test for determining the potential alkali-expansivity of aggregates

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DOIResolve DOI: http://doi.org/10.1016/0008-8846(81)90028-4
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TypeArticle
Journal titleCement and Concrete Research
ISSN0008-8846
Volume11
IssueSept/Nov.
Pages699711; # of pages: 13
Subjectaggregates; expansion; expanded aggregates; rapid expansion measurement; alkali carbonates; siliceous aggregates; alkali silica reactive rocks; concrete prism method comparison; Concrete
AbstractExpansion of miniature rock prisms sawn normal to the layering of the rock and stored in 2N NaOH was monitored with a Huggenberger gauge or a linear voltage differential transformer (LVDT). Owing to their thinness (3 mm) the samples become saturated quickly and expansion usually commences within the first week, compared with the long initiation period typical of the rock cylinder method ASTM C586. The miniature rock prism test was evaluated for alkali-carbonate, slowly expanding siliceous aggregates and classical alkali-silica reactive rocks. Rates of expansion generally correlated well with those of corresponding concrete prisms tested according to CSA A23.2 - 14A.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-1023
NRC number20074
1519
NPARC number20378917
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Record identifierd3c939c9-1d74-4356-8b4c-6e401773024d
Record created2012-07-24
Record modified2016-05-09
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