FINE-GRAIN CONCRETE Russian patent published in 2013 - IPC C04B28/04 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention relates to construction materials and can be used for manufacturing products from fine-grain concrete, both in civil and in industrial construction. Fine-grain concrete is obtained from mixture, which contains Portland cement, fractioned quartz sand with content of fractions in the following ratio, %: fraction 5-1.25 mm - 57-63; fraction 1.25-0.315 mm - 17-23; fraction 0.315-0.14 mm - 17-23, ground quartz sand with specific surface S_sp=120-170 m²/kg, product, based on modified polycarboxylate hyperplasticiser "Melflux 265IF" and water, with the following component ratio, wt %: Portland cement 15.0-23.0, fractioned sand 68.1-78.1, ground quartz sand 1.5-2.3, hyperplasticiser "Melflux 265IF" 0.075-0.115, water the remaining part.

EFFECT: increased compression resistance and flexural strength at early and design age, reduction of water absorption.

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