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Electrical conductivity of Portland cement mortars
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 a polynomial. For the plot of mortar electrical conductivity versus aggregate volume fraction, the limiting slope for dilute aggregate volume fraction is related to the competition between the insulating aggregate and the conductive transition zone. When the slope >0, the former is signifcant. The mortar electrical conductivity behavior for aggregate volume fractions greater than 0.10 can be approximated by the ideal case of insulating spheres embedded in a conductive matrix. The transition zone electrical conductivity has about the same electrical conductivity as the corresponding cement paste for the aggregate sizes used in this investigation.
Electrical conductivity of Portland cement mortars
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 a polynomial. For the plot of mortar electrical conductivity versus aggregate volume fraction, the limiting slope for dilute aggregate volume fraction is related to the competition between the insulating aggregate and the conductive transition zone. When the slope >0, the former is signifcant. The mortar electrical conductivity behavior for aggregate volume fractions greater than 0.10 can be approximated by the ideal case of insulating spheres embedded in a conductive matrix. The transition zone electrical conductivity has about the same electrical conductivity as the corresponding cement paste for the aggregate sizes used in this investigation.
Electrical conductivity of Portland cement mortars
Elektrische Leitfähigkeit von Portlandzementmörtel
Tumidajski, P.J. (author)
Cement and Concrete Research ; 26 ; 529-534
1996
6 Seiten, 3 Bilder, 4 Tabellen, 7 Quellen
Article (Journal)
English
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