Impact of admixtures on the hydration kinetics of Portland cement

Journal Article · Thu Dec 15 04:00:00 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, Journal Name: Cement and Concrete Research Journal Issue: 12 Vol. 41; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

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