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Influence of chemical composition and inorganic admixtures on the electrical conductivity of hydrating cement pastes

Published online by Cambridge University Press:  31 January 2011

M. Perez-Pena ,
D. M. Roy  and
F. D. Tamás
M. Perez-Pena
Affiliation:
Materials Research Laboratory, The Pennsylvania State University. University Park, Pennsylvania 16802
D. M. Roy
Affiliation:
Materials Research Laboratory, The Pennsylvania State University. University Park, Pennsylvania 16802
F. D. Tamás
Affiliation:
University of Veszprem, Institute of Silicate Chemistry and Technology, H-8201 Veszprem, P.O. B. 158, Hungary
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Abstract

Electrical conductivity of cementitious materials with a wide range of chemical compositions has been studied during the first 24 h of hydration. Relationships between heat of hydration and electrical conductivity curves are discussed. Results are tentatively explained in terms of some physical and chemical parameters. Further evidence that the electrical conductivity of hydrating cement pastes is related to the hydration mechanisms operating in these systems was obtained. The order in which the cations of inorganic admixtures (chlorides and hydroxides) were found to increase the peak and rate of development of the electrical conductivity is the same order that they have been found to increase the heat liberated upon hydration of systems containing these admixtures.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 1 , February 1989 , pp. 215 - 223
Copyright
Copyright © Materials Research Society 1989

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