FIELD: construction.
SUBSTANCE: invention relates to compositions of crude mixtures, which can be used as binding materials of construction materials. Raw mixture contains following, wt%: magnesium sulphate 0.3-0.8; magnesite 8.0-15.0; phlogopite 3.0-6.0; portland cement - balance.
EFFECT: technical result consists in improvement of strength of articles.
1 cl, 1 tbl
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