✦ LIBER ✦

Electrical conductivity of Portland cement mortars

✍ Scribed by Peter J. Tumidajski

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 374 KB
Volume: 26
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(96)00027-0

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✦ Synopsis

Mortars containing volume fractions of aggregate less than 0.35 were prepared at w/c = 0.35, 0.40, and 0.45 and hydrated for 1, 14, and 28 days. Mortar electrical conductivities were determined by impedance spectroscopy, and the experimental data were fitted to the polynomial, where, (I, is the mortar conductivity, V, is the aggregate volume, V, is the mortar volume, and A, B, C, and D are constants. Mortar electrical conductivity behavior appears to involve a competition between the insulating aggregate which lowers the mortar electrical conductivity and the development of a transition zone between the paste and aggregate which increases the conductivity. Values for the transition zone electrical conductivity were determined.

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