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Monitoring hydration of alkali-activated slag and fly ash

Ezirim, H.C. / McCarter, W.J.

This paper presents developments in electrical impedance methods to study hydration and reaction kinetics of alkali activated slags and fly ash at room temperature (i.e. 21 deg C). To highlight the testing methodology, work focuses on monitoring the temporal change in both conductance and capacitance of a typical slag and low-lime fly ash activated with calcium hydroxide. Measurements were taken over time scales extending up to six days hydration. It is also shown that the measured electrical parameters change markedly with frequency of applied electrical field. The latter was found particularly relevant to capacitance measurements.

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Monitoring hydration of alkali-activated slag and fly ash

Ezirim, H.C. / McCarter, W.J.

This paper presents developments in electrical impedance methods to study hydration and reaction kinetics of alkali activated slags and fly ash at room temperature (i.e. 21 deg C). To highlight the testing methodology, work focuses on monitoring the temporal change in both conductance and capacitance of a typical slag and low-lime fly ash activated with calcium hydroxide. Measurements were taken over time scales extending up to six days hydration. It is also shown that the measured electrical parameters change markedly with frequency of applied electrical field. The latter was found particularly relevant to capacitance measurements.

Monitoring hydration of alkali-activated slag and fly ash

Ezirim, H.C. / McCarter, W.J.

This paper presents developments in electrical impedance methods to study hydration and reaction kinetics of alkali activated slags and fly ash at room temperature (i.e. 21 deg C). To highlight the testing methodology, work focuses on monitoring the temporal change in both conductance and capacitance of a typical slag and low-lime fly ash activated with calcium hydroxide. Measurements were taken over time scales extending up to six days hydration. It is also shown that the measured electrical parameters change markedly with frequency of applied electrical field. The latter was found particularly relevant to capacitance measurements.

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Titel:

Monitoring hydration of alkali-activated slag and fly ash

Beteiligte:

Ezirim, H.C. (Autor:in) / McCarter, W.J. (Autor:in)

Erschienen in:

Fly Ash, Silica Fume, Slage & Natural Pozzolans in Concrete, CANMET/ACI International Conference, 6 ; 821-835

SP ACI special publications series / ACI, American Concrete Institute ; 178,2

Erscheinungsdatum:

1998

Format / Umfang:

15 Seiten, 5 Bilder, 1 Tabelle, 19 Quellen

Medientyp:

Aufsatz (Konferenz)

Format:

Print

Sprache:

Englisch

Schlagwörter:

Schlacke , Flugasche , hydraulisches Bindemittel , Hydratisieren , Reaktionskinetik , Reaktionsgeschwindigkeit , Raumtemperatur , Calciumhydroxid , elektrische Messmethode , Erhärten (Zementabbinden) , elektrische Leitfähigkeit , Röntgenbeugung , elektrische Kapazität

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Monitoring Hydration of Alkali-Activated Slag and Fly Ash

Ezirim, H. C. / McCarter, W. J. / Canada Centre for Mineral and Energy Technology et al. | British Library Conference Proceedings | 1998

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