FIELD: construction.
SUBSTANCE: invention relates to the field of construction, namely, to mineral boards for internal finishing of premises, especially for suspended ceilings. A mineral board, comprising the main mat, including mineral fibres, a filler, binding substances, on which after its drying additional coatings are applied, where the main mat includes, wt % of the total mass of dry hard substances of the board: mineral fibres 30-80, as a filler - swollen pearlite 5-40, clay 5-30 and if necessary, calcium carbonate of not more than 20, binding substances, produced from the composition, including, wt %: liquid glass 0.5-15 and/or a thermosetting binder Acrodur 950L 0.5-10, starch 2-11 and, if required, cellulose binder in the form of paper not more than 10, at the same time local concentrations of clay, liquid glass and/or thermosetting binder Acrodur 950L, starch and, if required, cellulose binder in the form of paper, gradually reduce along board thickness in direction from face to rear side of the board, and local density of the board gradually decreases along board thickness in direction from the rear to the face side of the board, and its value on the rear side of the board is not more than 1.2 times exceeds its value on the face side of the board.
EFFECT: increased quality characteristics of boards with potential reduction of energy costs for their manufacturing.
4 tbl, 3 dwg
