retarding admixture

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1. In paint, varnish, or lacquer, a high-boiling solvent used to lower evaporation rate of the volatile ingredients.
2. An admixture which delays the setting of cement paste or the setting of mixtures such as mortar or concrete containing cement.
3. An additive, mixed with plaster to control the rate of hardening.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
and Double, D.D., 1984,"The chemistry of Hydration of High Alumina Cement in the presence of Accelerating and Retarding admixtures", Cement and Concrete Research.
Because of the range, manufacturers make retarding admixtures for light, medium, or deep exposures.