RAW MIXTURE AND METHOD FOR BUILDING ARTICLE MAKING Russian patent published in 2003 - IPC

FIELD: production of building materials, building industry. SUBSTANCE: invention relates to composites of raw mixture used for making wall and decorative building articles and to method of their making. The raw mixture used for making building articles comprises anhydrite, sodium phosphate addition and water. Anhydrite is a waste from fluoroanhydrite production and addition comprises additionally sodium water glass with sodium phosphate taken in the ratio = (1:1)- (5:1), respectively. The addition content in the raw mixture is 10-30 wt.% of components mass without water in the following ratio of the raw mixture components, wt.%: indicated fluoroanhydrite waste of production, 70-90; sodium water glass, 5-25; sodium phosphate, 5-15; water, up to value 10-15% of the raw mixture humidity. In the method of making building articles made of the raw mixture based on anhydrite with addition including moulding and exposition in water for 7-28 days the building articles are made from the raw mixture by claim 1 but before the water exposition method involves drying and calcinations at temperature 800-950 C. Invention provides the enhancement of water-resistance and strength of articles. EFFECT: improved method of making, enhanced quality of articles. 3 cl, 2 tbl