METHOD FOR MODIFYING GYPSUM CEMENTS

摘要

The invention relates to mineral binding agents and can be used for modifying all types of gypsum cements. The inventive method consists in grinding processable gypsum stone and in adding an alkali builder in the form of alkali metal (potassium and/or sodium) oxides or hydroxides in a quantity ranging from 0.1 to 0.4 % of a moisture-free calcium sulphate contained in the gypsum cement. Said additive can be introduced also into hardening water while preparing gypsum solutions. Said invention makes it possible to reduce a water-gypsum ratio of a solution and to increase strength of articles.