FIELD: chemistry.
SUBSTANCE: invention relates to production of crude mixtures which can be used for plastering concrete, brick, metal and wooden surfaces. The crude mixture for producing plaster contains the following in wt %: portland cement 26.3 - 27.0, quartz sand 52.8 - 53.8, liquid glass 4.06 - 4.16, 3-15 mm long mineral wool fibres 0.4 - 2.38, sugar 0.013 - 0.066, water - the balance.
EFFECT: high strength of plaster.
1 tbl
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