Percolation effects in the electrical conductivity of porous cement mortar
Författare
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.
Publiceringsår
1990
Språk
Engelska
Sidor
549-554
Publikation/Tidskrift/Serie
Europhysics Letters
Volym
13
Issue
6
Dokumenttyp
Artikel i tidskrift
Förlag
EDP Sciences
Ämne
- Physical Sciences
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0295-5075