Percolation effects in the electrical conductivity of porous cement mortar

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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.

Detaljer

Författare
Externa organisationer
  • External Organization - Unknown
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Fysik
Originalspråkengelska
Sidor (från-till)549-554
TidskriftEurophysics Letters
Volym13
Utgåva nummer6
StatusPublished - 1990
PublikationskategoriForskning
Peer review utfördJa
Externt publiceradJa