METHOD OF MANUFACTURING FACING AND ORNAMENTAL PARTS FROM ARTIFICIAL STONE Russian patent published in 1997 - IPC

FIELD: manufacture of building materials. SUBSTANCE: molding blend composed of magnesia cement, magnesium chloride, sand, dyeing pigment, and water is supplemented with plasticizer, alumina- chromium-phosphate additive, and ground quartz sand. Magnesium chloride solution with density 1.2-1.25 g/cu. cm is first prepared and then mixed with plasticizer, alumina-chromium-phosphate, and cement paste. Resultant mix is stirred in concrete mixer with dry mixture caustic magnesite, sand, and ground sand to yield sand blend which is put into molds and hardened. EFFECT: improved ornamental and physico-mechanical properties.