METHOD FOR PRODUCTION OF RAW MATERIALS MIXTURE FOR MANUFACTURING THE BUILDING ARTICLES Russian patent published in 1997 - IPC

FIELD: building materials production, particularly, production of facing building materials. SUBSTANCE: method involves mixing of magnesia binder and filler, the process is followed by mixing with salt solution of bischofite. Before mixing solution of bischofite is preliminary treated in magnetic field having intensity 160-340 kA/m, flow rate of solution in magnetic field is 0.6-1.5 m/s. Raw materials mixture comprises, mas.%: magnesia binder, 40-50; solution of bischofite having density 1.17-1.22 g/cm³, 22-33; filler, the balance. Bending strength of articles being manufactured of mixture is increased by 41 %, their water resistance is increased more than 3 times, their cold resistance is increased by more 30 %. EFFECT: increased density and fineness of structure.