Impedance spectroscopy (I.S.) measurements were carried out on ordinary Portland cement paste, cured in 100% relative humidity environment, at different temperatures. The results collected during 28 d show that the electrical conductivity decreases to an almost constant value. The higher the curing temperature the shorter is the time necessary to obtain the quasi-steady-state conditions. A thermally activated conduction mechanism in cement paste was observed. The possibility of using I.S. (a non-destructive and in-situ technique) to follow the evolution of the cement paste hydration process was validated by traditional techniques (X-ray diffraction and thermogravimetry). Very good agreement was obtained. © 2001 Elsevier Science B.V. All rights reserved.
Dotelli, G., Mari, C. (2001). The evolution of cement paste hydration process by impedance spectroscopy. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 303(1-2), 54-59 [10.1016/S0921-5093(00)01886-4].
The evolution of cement paste hydration process by impedance spectroscopy
MARI, CLAUDIO MARIA
2001
Abstract
Impedance spectroscopy (I.S.) measurements were carried out on ordinary Portland cement paste, cured in 100% relative humidity environment, at different temperatures. The results collected during 28 d show that the electrical conductivity decreases to an almost constant value. The higher the curing temperature the shorter is the time necessary to obtain the quasi-steady-state conditions. A thermally activated conduction mechanism in cement paste was observed. The possibility of using I.S. (a non-destructive and in-situ technique) to follow the evolution of the cement paste hydration process was validated by traditional techniques (X-ray diffraction and thermogravimetry). Very good agreement was obtained. © 2001 Elsevier Science B.V. All rights reserved.
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