METHOD TO MANUFACTURE CONSTRUCTION MATERIALS BASED ON MAGNESIA BINDER Russian patent published in 2014 - IPC C04B40/00 C04B28/30 

FIELD: construction.

SUBSTANCE: method to manufacture construction materials based on a magnesia binder includes activation of a magnesia binder, modified filler, plasticiser, pigment by the method of mechanical-chemical modification in solid state under condition of joint impact of pressure and shift deformations. Aqueous solution of magnesium chloride (aqueous solution of bischofite) and filler are added to the activated mix. The magnesia binder is caustic magnesite with addition of electric furnace magnesite. The modified filler in the raw mix is a complex silica-alumina filler including SiO₂, Al₂O₃, CaO, MgO, Fe₂O₃, FeO, SO₃ in different combinations and ratios, modified in solid state with oxide or salt of transition metal by the method of mechanical-chemical modification under conditions of joint impact of pressure and shift deformations, and also the raw mix may additionally contain mica and fibres (natural, polymer, metal, glass). The mix is hardened at the temperature of 10-90°C for 1÷14 h, and macromolecular structures of finished goods are exposed to diffusion process of introduction of oil/water emulsion in presence of a surfactant.

EFFECT: improved physical-mechanical characteristics of construction products with lighter weight of structural construction elements, improvement of decorative properties of finished goods.

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