FIELD: building materials, in particular facing clay brick.
SUBSTANCE: claimed mass contains (mass %) kembrian clay 60-80 and oil-contaminated granite screening of ballast chip as thinning and blowing agent 20-40. Granite screening is obtained in changing of railway bed ballast section.
EFFECT: facing brick with improved facing surface, increased strength; utilization of industrial waste; economy of natural gas.
1 ex, 1 tbl
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