Journal Published Online: 01 June 1995
Volume 17, Issue 1

Determination of Silica-Fume Content in Hardened Concrete by AC Impedance Spectroscopy

CODEN: CCAGDP

Abstract

A nondestructive method based on AC impedance spectroscopy was applied to studies of the electrical behavior of hydrated portland cement concrete containing silica fume. Silica fume content significantly influenced the impedance behavior of hydrated portland cement concrete. Correlations between the high frequency arc (HFA) diameter and the silica-fume content in concrete were obtained. Empirical relationships for concrete binders at early and more advanced hydration can be expressed as DHFA=Koβsf+Cfor early hydration times and DHFA=C(Ko)βsffor advanced hydration times where DHFA is the high frequency arc diameter, βsf is the silica-fume content, Ko, K′o, C, and C′ are constants related to hydration times and W-C ratio, and so forth.

Author Information

Gu, P
Institute for Research in Construction, Materials Laboratory, Ottawa, Ontario, Canada
Xie, P
University of Ottawa, Ottawa, Ontario, Canada
Beaudoin, JJ
Institute for Research in Construction, Materials Laboratory, Ottawa, Ontario, Canada
Pages: 6
Price: $25.00
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Stock #: CCA10343J
ISSN: 0149-6123
DOI: 10.1520/CCA10343J