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Retardation Effects in the Hydration of Cement-Fly Ash Pastes

Published online by Cambridge University Press:  25 February 2011

Michael W. Grutzeck ,
Wei Fajun  and
Della M. Roy
Michael W. Grutzeck
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
Wei Fajun
Affiliation:
Permanent Address–Wuhan Institute of Building Materials, Hubei, China
Della M. Roy
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
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Abstract

The hydration of high-calcium and low-calcium fly ash-cementmixtures was investigated to determine the effect of fly ash upon the hydration of a Type I portland cement, and to determine the associated mechanisms of hydration. When blended with portland cement, both fly ashes retarded the early hydration process, the high-Ca more so than the low-Ca. Analyses of solution compositions and calorimetric (heat of hydration) measurements were made. The retardation and hydration effects are discussed in terms of solution composition data and solid phase characterization. The hydration effects were interpreted and compared with the results of previous work.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 43: Symposium M – Fly Ash and Coal Conversion By-Products I , 1984 , 65
Copyright
Copyright © Materials Research Society 1985

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