Determination of a partial phase composition in calcined gypsum by calorimetric analysis of hydration kinetics

作者：Tydlitat Vratislav; Medved Igor; Cerny Robert^*

来源：Journal of Thermal Analysis and Calorimetry, 2012, 109(1): 57-62.

DOI：10.1007/s10973-011-1334-y

• Gypsum
• Calcium sulfate anhydrite III
• beta-Calcium sulfate hemihydrate
• Heat flow calorimeter

A calorimetric method for the determination of a partial phase composition in calcined gypsum is presented. The method is based on the separation of the reaction heat of the transformation of beta-anhydrite III to beta-hemihydrate from the main hydration reaction transforming beta-anhydrite III to dihydrate. Using the known hydration heats of beta-anhydrite III to dihydrate and beta-hemihydrate to dihydrate, the content of beta-calcium sulfate anhydrite III and beta-calcium sulfate hemihydrate as well as the amount of non-hydrating parts in gypsum can be determined. Practical application of the method is illustrated on three industrial products.

• 出版日期2012-7