Abstract
The low frequency conductivity of bentonite was investigated using an impedance analyzer (20 Hz–20 MHz). Pellets of pure bentonite clay were hydrated at different hydration levels. Results reveal that the AC conductivity increases with hydration of bentonite. Also, an equivalent circuit model with resistor, capacitor and constant phase elements was obtained from fitting of the Nyquist plots. The resistance of equivalent circuit components decreased with increasing hydration.
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