FIELD: chemistry.
SUBSTANCE: raw material mixture for production of fine-grained concrete contains, wt %: Portland cement 22.0-24.0, ashes from lignite or coal burning 65.9-69.3, caproic fibre cut into 10-20 mm segments 2.0-3.0, quartz sand 5.0-7.0, superplasticiser C-3 0.7-1.1, water-cement ratio 0.45-0.5.
EFFECT: reduction of Portland cement consumption in composition of raw material mixture with increase of fine-grained concrete strength.
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