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Theoretical Interpretation of the Existence at 40℃ of an Absolute Maximum of the Hydration Rate of Calcium Sulphate Hemi Hydrate under Microwave Irradiation

¹ Department of Civil Engineering, Mentouri University, Route de Ain El-Bey, Constantine, Algeria
² Université Claude Bernard Lyon I et CPE (Ecole Supérieure de Chimie Physique et Electronique de Lyon), Villeurbanne,Lyon, France
³ Department of Civil Engineering, Mentouri University, Route de Ain El-Bey, Constantine, Algeria

Open Journal of Civil Engineering·Volume 02 (2012)·Pages 49–52·Published 20 June 2012·DOI10.4236/ojce.2012.22008

Abstract

The temperature influence factor on the kinetics of hydration of hemi hydrated calcium sulphate β has been studied in this work under microwave irradiation between 10℃ and 50℃ by isothermal calorimetry. Results show that the temperature corresponding to a maximum of the maximum rate of hydration or a minimum of t m , the existence of which could be shown theoretically and experimentally during the conventional hydration does not exist under microwave irradiation. This maximum rate or minimum of t m , is replaced by a limit (above 40℃) which has been determined and interpreted.

KeywordsMicrowaveIsothermal CalorimetryCalcium Sulphate Hemi HydrateKinetics

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Theoretical Interpretation of the Existence at 40℃ of an Absolute Maximum of the Hydration Rate of Calcium Sulphate Hemi Hydrate under Microwave Irradiation

Abstract

References (11)