METHOD FOR MANUFACTURE OF PRODUCTS FROM ANHYDRITE Russian patent published in 2009 - IPC C04B28/16 C04B111/20 

FIELD: construction.

SUBSTANCE: invention is related to method for manufacture of products from anhydrite. In method for products manufacture from anhydrite including preparation of anhydrite mixture with additive that activates its hydration in process of combined crushing, moistening of produced mixture, further moulding and hardening of products, crushing is carried out together with 1-3% of plasticiser down to particle size of less than 80 mcm, and after moistening mixture is additionally exposed to hydromechanical activation for 3-5 minutes. Additive that activates anhydrite hydration may be Portland cement in amount of at least 20%. Moulded products may be dried at 50-70°C for 1-3 hours. On completion of drying products may be repeatedly moistened and dried.

EFFECT: reduction of time required for setting and hardening of anhydrite binder, and also increased strength of products on the basis of this binder.

4 cl, 1 tbl