FIELD: chemistry.
SUBSTANCE: invention relates to composition of a crude mixture which can be used to make brick, roofing tiles and slabs. The crude mixture for making construction products contains cast iron filings, refractory clay and sulphite waste liquor, with the following ratio of components, wt %: cast iron filings - 0.5-1.5; refractory clay - 97.0-99.0; sulphite waste liquor - 0.5-1.5.
EFFECT: high strength of products.
1 tbl
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