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A.C. impedance spectroscopy (II): Microstructural characterization of hydrating cement-silica fume systems

โœ Scribed by Ping Gu; Ping Xie; J.J. Beaudoin; R. Brousseau

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
558 KB
Volume
23
Category
Article
ISSN
0008-8846

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โœฆ Synopsis

The influence of silica fume on impedance behaviour of hydrating cement has been carefully investigated. The results demonstrate that impedance measurement is very sensitive to changes in hydration kinetics and microstructure development due to the presence of silica fume. A modified equivalent circuit containing a frequency dependent resistance element is proposed to model hydration of these microporous systems. A.C. impedance spectroscopy is demonstrated to be a useful tool for studying factors that influence pore structure in cement systems containing finely divided silica.

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Microstructural characterization of the transition zone in cement systems by means of A.C. impedance spectroscopy
โœ Ping Gu; Ping Xie; J.J. Beaudoin ๐Ÿ“‚ Article ๐Ÿ“… 1993 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 941 KB

The microstructure of the transition zone between aggregate and cement paste, and the effect of silica fume, slag, fly ash and latex (EVA) aggregate coatings were investigated by means of A.C. impedance measurements. It has been demonstrated experimentally that the A.C. impedance technique has the p