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Effect of Elevated Curing Temperature on Early Hydration and Microstructure of Composite Cements

Published online by Cambridge University Press:  11 February 2011

J Hill,
B R Whittle,
J H Sharp and
M Hayes
J Hill
Affiliation:
Immobilisation Science Laboratory, University of Sheffield, Department of Engineering Materials, Mappin Street, Sheffield, S1 3JD, UK
B R Whittle
Affiliation:
Immobilisation Science Laboratory, University of Sheffield, Department of Engineering Materials, Mappin Street, Sheffield, S1 3JD, UK
J H Sharp
Affiliation:
Immobilisation Science Laboratory, University of Sheffield, Department of Engineering Materials, Mappin Street, Sheffield, S1 3JD, UK
M Hayes
Affiliation:
BNFL plc, Sellafield, Seascale, Cumbria, CA20 1PG, UK
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Abstract

The heat of hydration of a number of composite cement systems has been studied using isothermal conduction calorimetry (ICC) from ambient temperature to 90°C. The resulting hardened cement paste, from the high temperature regime, was then examined by scanning electron microscopy. Results showed that increasing the hydration temperature increased the rate of heat output for all systems and, at early ages, decreased the porosity of the sample.

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