PRODUCTION OF ALL-PURPOSE CONSTRUCTION BOARDS Russian patent published in 2014 - IPC C04B40/00 C04B28/30 

FIELD: process engineering.

SUBSTANCE: invention relates to production of construction materials and can be used for production of boards for internal and external facing of whatever buildings, spandrel panels, stair boards and small architectural structures. Proposed method comprises mixing of magnesite binder, organic filler, mineral filler and aqueous solution of magnesium chloride, forming of the articles, their curing and drying. Mineral filler consists of two or more components one of which being a co-precipitated calcium-magnesium component and another one being the perlite. Aqueous solution of magnesium chloride is mixed with corrosion inhibitor before addition to the mix. Note here that ratio of components in common mix is as follows, in wt %: magnesite binder - 10-40, aqueous solution of magnesium chloride with density of 1.1-1.3 g/cm³ - 40-70, organic filler - 4-15, mineral filler - 2-20, and corrosion inhibitor - 0.015-0.025. Plasticiser can be added in amount of 0.01-0.50%, in terms of dry mass, of total weight.

EFFECT: lower corrosion activity, optimum operating properties, non-polluting boards.

11 cl