Abstract
The present study is connected with the utilization of gypsum by-produced in the process of manufacturing sea-salt gypsum for gypsum cement.
Insoluble anhydrite (II-CaSO4) was calcined at 800°C to prepare its sample from sea-salt gypsum. Then, the authors investigated, in accordance with the experimental design, effects of several kinds of accelerator for hardening and ageing conditions upon the setting time, the strength and the hydrating degree of cement.
The following results were obtained:
1. The setting time of cement was the shortest when 1 wt% of potassium sulfate was added.
2. The strength was affected by the ageing conditions.
3. The strength was not always large even if the hydrating degree of cement was high.
