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Percolation effects in the electrical conductivity of porous cement mortar

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Author

Summary, in English

We have studied the electrical properties of cement mortars in the frequency range 10-3 to 107 Hz. The bulk d.c. conductivity was distinguished from electrode polarization effects at low frequencies as well as from a frequency dispersion at high frequencies. The bulk conductivity displays a dramatic variation with the water content of the samples. A percolation threshold can be seen at very low water contents. The conductivity varies as a power law of water content above the threshold. The power law exponent is consistent with the predictions of a percolation theory of Trugman and Weinrib.

Publishing year

1990

Language

English

Pages

549-554

Publication/Series

Europhysics Letters

Volume

13

Issue

6

Document type

Journal article

Publisher

EDP Sciences

Topic

  • Physical Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 0295-5075