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Kinetics of slag hydration in the presence of calcium hydroxide

Biernacki, J.J. / Richardson, J.M. / Stutzman, P.E. / Bentz, D.P.

The reaction between ground granulated blast furnace slag (GGBFS) having an empirical formula of C(7.88)S(7.39)M3A and calcium hydroxide (CH) was investigated. The kinetics of the reaction were explored. Thermogravimetric analysis was used to monitor the consumption of CH from which rate constants were determined. Based on Knudsen's kinetic model, activation energies of 14.5, 17.9, and 22.6 kJ/mol were determined for three different mass ratios of slag and CH reacted over a temperature range of 15 to 50 deg C and hydrated for a period of time from 0 to 32 days. A comparison of the kinetics of the slag/CH reaction was made with slag/portland cement hydration. The basic features of both appear similar.

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Kinetics of slag hydration in the presence of calcium hydroxide

Biernacki, J.J. / Richardson, J.M. / Stutzman, P.E. / Bentz, D.P.

The reaction between ground granulated blast furnace slag (GGBFS) having an empirical formula of C(7.88)S(7.39)M3A and calcium hydroxide (CH) was investigated. The kinetics of the reaction were explored. Thermogravimetric analysis was used to monitor the consumption of CH from which rate constants were determined. Based on Knudsen's kinetic model, activation energies of 14.5, 17.9, and 22.6 kJ/mol were determined for three different mass ratios of slag and CH reacted over a temperature range of 15 to 50 deg C and hydrated for a period of time from 0 to 32 days. A comparison of the kinetics of the slag/CH reaction was made with slag/portland cement hydration. The basic features of both appear similar.

Kinetics of slag hydration in the presence of calcium hydroxide

Biernacki, J.J. / Richardson, J.M. / Stutzman, P.E. / Bentz, D.P.

The reaction between ground granulated blast furnace slag (GGBFS) having an empirical formula of C(7.88)S(7.39)M3A and calcium hydroxide (CH) was investigated. The kinetics of the reaction were explored. Thermogravimetric analysis was used to monitor the consumption of CH from which rate constants were determined. Based on Knudsen's kinetic model, activation energies of 14.5, 17.9, and 22.6 kJ/mol were determined for three different mass ratios of slag and CH reacted over a temperature range of 15 to 50 deg C and hydrated for a period of time from 0 to 32 days. A comparison of the kinetics of the slag/CH reaction was made with slag/portland cement hydration. The basic features of both appear similar.

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Title:

Kinetics of slag hydration in the presence of calcium hydroxide

Additional title:

Kinetik der Schlackenhydratisierung in Anwesenheit von Calciumhydroxid

Contributors:

Biernacki, J.J. (author) / Richardson, J.M. (author) / Stutzman, P.E. (author) / Bentz, D.P. (author)

Published in:

Journal of the American Ceramic Society ; 85 ; 2261-2268

Publication date:

2002

Size:

8 Seiten, 9 Bilder, 3 Tabellen, 26 Quellen

ISSN:

DOI:

https://doi.org/10.1111/j.1151-2916.2002.tb00445.x

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Schlacke , Siliciumoxid , Calciumoxid , Magnesiumoxid , Aluminiumoxid , Hydratisieren , Calciumhydroxid , Kinetik , Thermogravimetrie , Aktivierungsenergie , Temperatureinfluss , Portlandzement

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