A review of test methods for alkali-expansivity of concrete aggregates

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ConferenceProceedings, Conference on Alkali-Aggregate Reaction in Concrete: 30 March 1981, Cape Town, South Africa
Pages113; # of pages: 13
Subjectbases (chemistry); concrete admixtures; expansion; test procedures; Concrete; base (chimie); adjuvant; dilatation; methode d'essai
AbstractThere are four accelerated test methods that are frequently used to determine the potential alkali-expansivity of various types of concrete aggregates. These are the mortar bar method, the concrete prism method, the rock cylinder method and the chemical method. The paper describes each of these methods and discusses the appropriateness of each for assessing expansivity reactions with different types of aggregate. Approximate minumum rates of expansion, above which samples would be considered deleteriously expansive, are presented for mortar bar and concrete prisms made with different types of aggregates.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number19672
NPARC number20378501
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Record identifier696ce302-8d0c-4c3f-9095-f84517ff9221
Record created2012-07-24
Record modified2016-05-09
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