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Percolation effects in the electrical conductivity of porous cement mortar

Brantervik, K.; Berg, A.; Niklasson, G.A.; Hedberg, B. and Nilsson, Lars-Olof LU (1990) In Europhysics Letters 13(6). p.549-554
Abstract
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.
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Europhysics Letters
volume
13
issue
6
pages
549 - 554
publisher
EDP Sciences
external identifiers
  • scopus:0742310587
ISSN
0295-5075
DOI
10.1209/0295-5075/13/6/013
language
English
LU publication?
no
id
d5b7458a-2752-476f-882a-357443080644 (old id 1485654)
date added to LUP
2009-10-05 08:39:25
date last changed
2017-09-17 04:53:51
@article{d5b7458a-2752-476f-882a-357443080644,
  abstract     = {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.},
  author       = {Brantervik, K. and Berg, A. and Niklasson, G.A. and Hedberg, B. and Nilsson, Lars-Olof},
  issn         = {0295-5075},
  language     = {eng},
  number       = {6},
  pages        = {549--554},
  publisher    = {EDP Sciences},
  series       = {Europhysics Letters},
  title        = {Percolation effects in the electrical conductivity of porous cement mortar},
  url          = {http://dx.doi.org/10.1209/0295-5075/13/6/013},
  volume       = {13},
  year         = {1990},
}