FIELD: chemistry.
SUBSTANCE: invention relates to production of construction materials based on phosphogypsum binder. The crude mixture for making gypsum brick contains the following in wt %: phosphogypsum binder 48-52; quartz sand 17-25; ground unslaked lime 0.05-0.15; synthetic fibre filler 0.5-0.9; water - the rest.
EFFECT: high strength of the brick made from the crude mixture.
1 tbl
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