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Electrode configurations and impedance spectra of cement pastes

โœ Scribed by S. J. Ford; T. O. Mason; B. J. Christensen; R. T. Coverdale; H. M. Jennings; E. J. Garboczi


Book ID
104737830
Publisher
Springer
Year
1995
Tongue
English
Weight
644 KB
Volume
30
Category
Article
ISSN
0022-2461

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The spectra of complex dielectric constant were measured on a fresh cement paste with a water/cement ratio of 0.4 sandwiched between insulated electrodes in the frequency range 10 kHz-1 MHz and temperature range between O~ and -30~ The bulk dielectric constant, 30-20, and conductivity, 6.14x 10-5-0.

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Impedance spectra were collected in situ during the exchange of the aqueous phase with an organic solvent in young (1-28 days old) ordinary portland cement (OPC) pastes at two water-to-cement ratios (w/c = 0.35 and 0.70). The high initial values of dielectric constant (103-105) and the rapid decline