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Thermoelasticity of belite in Portland cement clinker

Fukuda, K. / Ito, S. / Taguchi, H.

Belite crystals, separated from an industrial cement clinker, were examined by high-temperature powder X-ray diffractometry. We determined the starting and finishing temperatures of the alpha'_L-to-beta martensitic transformation and those of the reverse (beta-to-alpha'_L) transformation. The thermal hysteresis was negative (-65 degree C), indicating the thermoelasticity of the transformation. Each of the transformation temperatures was lower than that of pure Ca₂SiO₄. Because the finishing temperature of the alpha'_L-to-beta transformation was higher than ambient temperature, the alpha'_L-phase was entirely inverted to the beta-phase during cooling.

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Thermoelasticity of belite in Portland cement clinker

Fukuda, K. / Ito, S. / Taguchi, H.

Belite crystals, separated from an industrial cement clinker, were examined by high-temperature powder X-ray diffractometry. We determined the starting and finishing temperatures of the alpha'_L-to-beta martensitic transformation and those of the reverse (beta-to-alpha'_L) transformation. The thermal hysteresis was negative (-65 degree C), indicating the thermoelasticity of the transformation. Each of the transformation temperatures was lower than that of pure Ca₂SiO₄. Because the finishing temperature of the alpha'_L-to-beta transformation was higher than ambient temperature, the alpha'_L-phase was entirely inverted to the beta-phase during cooling.

Thermoelasticity of belite in Portland cement clinker

Fukuda, K. / Ito, S. / Taguchi, H.

Belite crystals, separated from an industrial cement clinker, were examined by high-temperature powder X-ray diffractometry. We determined the starting and finishing temperatures of the alpha'_L-to-beta martensitic transformation and those of the reverse (beta-to-alpha'_L) transformation. The thermal hysteresis was negative (-65 degree C), indicating the thermoelasticity of the transformation. Each of the transformation temperatures was lower than that of pure Ca₂SiO₄. Because the finishing temperature of the alpha'_L-to-beta transformation was higher than ambient temperature, the alpha'_L-phase was entirely inverted to the beta-phase during cooling.

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Title:

Thermoelasticity of belite in Portland cement clinker

Contributors:

Fukuda, K. (author) / Ito, S. (author) / Taguchi, H. (author)

Published in:

Cement and Concrete Research ; 28 ; 1141-1145

Publication date:

1998

Size:

5 Seiten, 19 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0008-8846(98)00085-4

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Portlandzement , martensitische Umwandlung , Calciumverbindung , Kühlung , Belit , Zementklinker , Dicalciumsilicat , Umwandlungstemperatur , Alpha-Phase , Beta-Phase , thermoelastische Eigenschaft

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