alkali-aggregate reaction

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.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.