Author(s)

Abdelhadi Tekkouk, Etienne Karmazsin, Mohamed Laid Samai

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

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.

Microwave; Isothermal Calorimetry; Calcium Sulphate Hemi Hydrate; Kinetics

A. Tekkouk, E. Karmazsin and M. Samai, "Theoretical Interpretation of the Existence at 40℃ of an Absolute Maximum of the Hydration Rate of Calcium Sulphate Hemi Hydrate under Microwave Irradiation," Open Journal of Civil Engineering, Vol. 2 No. 2, 2012, pp. 49-52. doi: 10.4236/ojce.2012.22008.