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Microwave Characterization of Cement Hydration

Published online by Cambridge University Press:  15 February 2011

M. Moukwa ,
M. Brodwin ,
S. Christo ,
J. Chang  and
S.P. Shah
M. Moukwa
Affiliation:
Research and Development, Master Builders Inc., 23700 Chagrin, Cleveland, OH
M. Brodwin
Affiliation:
NSF Center for Advanced Cement Based Materials, Northwestern niversity, Evanston, IL.
S. Christo
Affiliation:
NSF Center for Advanced Cement Based Materials, Northwestern niversity, Evanston, IL.
J. Chang
Affiliation:
NSF Center for Advanced Cement Based Materials, Northwestern niversity, Evanston, IL.
S.P. Shah
Affiliation:
NSF Center for Advanced Cement Based Materials, Northwestern niversity, Evanston, IL.
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Abstract

Conductivity and permittivity of cements were measured during the first 24 h hydration period at 10.0 GHz using front surface reflection methods. Data trends closely followed the hypothesis that the microwave results responded to the transition from free to bound water as hydration proceeded. The results were also compared to measured hydration curves and changes in the slope of the data versus time correlated well with characteristics regions of the hydration curve. The results establish the usefulness of microwave characterization for the study of chemistry and structure during the hydration period and may lead to a non destructive test method for cementitious materials during the early curing period.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 245: Symposium K – Advanced Cementitious Systems: Mechanisms and Properties , 1991 , 253
Copyright
Copyright © Materials Research Society 1992

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References

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