FIELD: chemistry.
SUBSTANCE: invention relates to compositions of crude mixtures for producing expanded clay, which can be used in the industry of structural materials. The crude mixture for producing expanded clay contains, wt %: clay material 88.0-90.0, spent grains from wine and cognac production 1.5-2.5, kaolin 1.5-2.5, marble powder 6.0-8.0.
EFFECT: high strength of expanded clay made from the crude mixture.
1 tbl
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