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Dehydration kinetics of calcium aluminate cement hydrate under non-isothermal conditions

Maitra, S. / Bose, S. / Bandyopadhyay, N. / Roychoudhury, A.

Calcium aluminate cement (containing 75% Al₂O₃), which finds extensive high temperature applications, was synthesized by sintering a mixture of calcined alumina and synthetic calcium carbonate. The cement was hydrated and its kinetics of thermal dehydration was studied under non-isothermal conditions by thermo-gravimetry using the integral approximation model. It was observed that on heating the cement hydrate followed multistage dehydration with different reaction orders at different stages. The activation energies of dehydration for these different stages were compared.

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Dehydration kinetics of calcium aluminate cement hydrate under non-isothermal conditions

Maitra, S. / Bose, S. / Bandyopadhyay, N. / Roychoudhury, A.

Calcium aluminate cement (containing 75% Al₂O₃), which finds extensive high temperature applications, was synthesized by sintering a mixture of calcined alumina and synthetic calcium carbonate. The cement was hydrated and its kinetics of thermal dehydration was studied under non-isothermal conditions by thermo-gravimetry using the integral approximation model. It was observed that on heating the cement hydrate followed multistage dehydration with different reaction orders at different stages. The activation energies of dehydration for these different stages were compared.

Dehydration kinetics of calcium aluminate cement hydrate under non-isothermal conditions

Maitra, S. / Bose, S. / Bandyopadhyay, N. / Roychoudhury, A.

Calcium aluminate cement (containing 75% Al₂O₃), which finds extensive high temperature applications, was synthesized by sintering a mixture of calcined alumina and synthetic calcium carbonate. The cement was hydrated and its kinetics of thermal dehydration was studied under non-isothermal conditions by thermo-gravimetry using the integral approximation model. It was observed that on heating the cement hydrate followed multistage dehydration with different reaction orders at different stages. The activation energies of dehydration for these different stages were compared.

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Title:

Dehydration kinetics of calcium aluminate cement hydrate under non-isothermal conditions

Contributors:

Maitra, S. (author) / Bose, S. (author) / Bandyopadhyay, N. (author) / Roychoudhury, A. (author)

Published in:

Ceramics International ; 31 ; 371-374

Publication date:

2005

Size:

4 Seiten, 7 Quellen

ISSN:

DOI:

https://doi.org/10.1016/j.ceramint.2004.06.002

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Zement , Calciumaluminat , Aluminiumoxid , Dehydratation , Reaktionskinetik , Isotherme , Hydraulik , Thermogravimetrie , Approximationstheorie , Calciumaluminathydrat , Tonerdeschmelzzement

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