Impact of admixtures on the hydration kinetics of Portland cement

Journal Article · Thu Dec 15 00:00:00 EST 2011 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2011.03.005· OSTI ID:21576905

Cheung, J ^[1]; Jeknavorian, A ^[1]; Roberts, L ^[2]; Silva, D ^[1]

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1. W.R. Grace, 62 Whittemore Avenue, Cambridge MA 02140 (United States)
2. Roberts Consulting Group LLC, 44 Windsor Avenue, Acton MA 01720 (United States)

Most concrete produced today includes either chemical additions to the cement, chemical admixtures in the concrete, or both. These chemicals alter a number of properties of cementitious systems, including hydration behavior, and it has been long understood by practitioners that these systems can differ widely in response to such chemicals. In this paper the impact on hydration of several classes of chemicals is reviewed with an emphasis on the current understanding of interactions with cement chemistry. These include setting retarders, accelerators, and water reducing dispersants. The ability of the chemicals to alter the aluminate-sulfate balance of cementitious systems is discussed with a focus on the impact on silicate hydration. As a key example of this complex interaction, unusual behavior sometimes observed in systems containing high calcium fly ash is highlighted.

• OSTI ID: 21576905
• Journal Information: Cement and Concrete Research, Vol. 41, Issue 12; Conference: International summit on cement hydration kinetics and modeling;CONMOD10: Symposium on concrete modelling, Quebec City, PB (Canada);Lausanne (Switzerland), 27-29 Jul 2009;22-25 Jun 2010; Other Information: DOI: 10.1016/j.cemconres.2011.03.005; PII: S0008-8846(11)00066-4; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
ALUMINATES
CALCIUM
CONCRETES
FLY ASH
HYDRATION
INTERACTIONS
KINETICS
PORTLAND CEMENT
SILICATES
SULFATES
AEROSOL WASTES
ALKALINE EARTH METALS
ALUMINIUM COMPOUNDS
ASHES
BUILDING MATERIALS
CEMENTS
COMBUSTION PRODUCTS
ELEMENTS
MATERIALS
METALS
OXYGEN COMPOUNDS
RESIDUES
SILICON COMPOUNDS
SOLVATION
SULFUR COMPOUNDS
WASTES