Intrinsic conductivity of short conductive fibers in composites by impedance spectroscopy

A. D. Hixson, L. Y. Woo, M. A. Campo, Thomas O Mason, E. J. Garboczi

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Electrical property measurements (DC conductivity, impedance spectroscopy) were employed to determine the "intrinsic conductivities" of short conductive fibers in cement matrix composites. Intrinsic conductivity determines, in the dilute limit, the variation of overall conductivity (DC or AC) vs. volume fraction of fibers. Model composites consisting of steel wires (0.5 mm diameter), but with aspect ratios comparable to typical carbon or steel fibers used in cement/concrete, were shown to exhibit similar "dual-arc" impedance spectra as observed in actual composites. The results were compared with existing calculations for composites with randomly distributed right cylinders. The conductivity vs. aspect ratio behavior can be used to estimate the fiber aspect ration in randomly distributed fiber composites.

Original languageEnglish
Pages (from-to)189-195
Number of pages7
JournalJournal of Electroceramics
Volume7
Issue number3
DOIs
Publication statusPublished - Dec 2001

Fingerprint

Spectroscopy
impedance
conductivity
composite materials
fibers
Fibers
Composite materials
spectroscopy
cements
aspect ratio
Aspect ratio
Cements
direct current
rations
Steel fibers
fiber composites
Steel
carbon steels
carbon fibers
Carbon fibers

Keywords

  • Cement
  • Composites
  • Electrical conductivity
  • Fibers
  • Impedance

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Intrinsic conductivity of short conductive fibers in composites by impedance spectroscopy. / Hixson, A. D.; Woo, L. Y.; Campo, M. A.; Mason, Thomas O; Garboczi, E. J.

In: Journal of Electroceramics, Vol. 7, No. 3, 12.2001, p. 189-195.

Research output: Contribution to journalArticle

Hixson, A. D. ; Woo, L. Y. ; Campo, M. A. ; Mason, Thomas O ; Garboczi, E. J. / Intrinsic conductivity of short conductive fibers in composites by impedance spectroscopy. In: Journal of Electroceramics. 2001 ; Vol. 7, No. 3. pp. 189-195.
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