alkali-aggregate reaction


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alkali-aggregate reaction

[′al·kə‚lī ′ag·rə·gət rē′ak·shən]
(chemistry)
The chemical reaction of an aggregate with the alkali in a cement, resulting in a weakening of the concrete.

alkali-aggregate reaction

A chemical reaction in mortar or concrete between alkalies from portland cement or other sources and certain constituents of some aggregates; under certain conditions, deleterious expansion of the concrete or mortar may result.
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