FIELD: chemistry.
SUBSTANCE: invention relates to production of building materials based on phosphogypsum binder. The crude mixture for making gypsum brick contains, wt %: phosphogypsum binder 37-45; quartz sand 7-9; pumice ground until complete passage through sieve No008 15-17; urea-formaldehyde resin 2-3; water 30-35.
EFFECT: low consumption of phosphogypsum binder while preserving strength of the gypsum brick.
1 tbl
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