HIGH-STRENGTH CONCRETE Russian patent published in 2015 - IPC C04B28/04 C04B24/24 C04B22/06 C04B103/32 

FIELD: construction.

SUBSTANCE: high-strength concrete produced from a mixture containing Portland cement, sand, crushed stone, water and a complex additive, contains quartz sand with fineness modulus, M_fineness=2.7 as sand, granite crushed stone with particle size of 5-10 mm as crushed stone and a complex additive with density of 1.017 g/cm³ and pH 6.5±0.5, which consists of iron hydroxide sol (III) with density ρ=1.021 g/cm³ and pH 5.0±0.5, and a plasticising agent from a mixture of polycarboxylate polymers: a polycarboxylate polymer on the basis of methacrylic acid with density ρ=0.95 g/cm³ and pH 7.0±0.5, a polycarboxylate polymer on the basis of an allyl ester and an anhydride of maleinic acid with density ρ=1.03 g/cm³ and pH 7.0±0.5, and water at the following component ratio, wt %: polycarboxylate polymer on the basis of methacrylic acid with density ρ=0.95 g/cm³ and pH 7±0.5-10.5-11.5; polycarboxylate polymer on the basis of an allyl ester and an anhydride of maleinic acid with density ρ=1.03 g/cm³ and pH 7±0.5-11.5-11.8; iron hydroxide sol (III) with density ρ=1.021 g/cm³, pH 5.0±0.5-8.0-8.5; water - 69.0-69.2 at the following component ratio of raw mixture, wt %: Portland cement 17.7-18.4; the above sand 41.62-42.0; the above crushed stone 32.8-33.0; the above additive 0.18-0.2; water - 7.0-7.1.

EFFECT: reduction of settlement of concrete at the age of 120 days by 3,16 times.

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