METHOD OF PRODUCTION OF ARTICLES FROM GYPSUM Russian patent published in 2007 - IPC C04B28/14 B28B3/00 C04B111/27 

FIELD: construction engineering; manufacture of walls and facing items from gypsum.

SUBSTANCE: proposed method includes grinding the calcium sulfate dihydrate, tempering it and molding articles. Grinding is continued till obtaining poly-dispersed coarse and fine powders characterized by residue on sieve No.2 of 15-23% and up to 2%, respectively at ratio of average diameters of particles in coarse and fine powders D/d equal to 16; then, coarse and fine powders are mixed in dry form at ratio of 1:1.23 and mixture thus obtained is tempered by saturated lime solution till obtaining semi-dry mixture at moisture content of 14-16%; molding is performed by semi-dry method at pressure of 30-25 Mpa.

EFFECT: enhanced resistance to water; reduced power requirements.

4 dwg, 1 tbl, 1 ex