HIGH-STRENGTH CONCRETE Russian patent published in 2015 - IPC C04B28/04 C04B22/08 C04B24/04 C04B111/20 C04B111/76 

FIELD: construction.

SUBSTANCE: high-strength concrete consisting of a mixture containing Portland cement, sand, crushed stone, a silica-containing component, an additive and water, contains sand with fineness modulus M_f=2.4, crushed stone with particle size of 5-10 mm, silica-containing component - sol H₂SiO₃ with density ρ=1.014 g/cm³ and pH=4±0.5, an additive - a water solution with density ρ=1.035 g/cm³ and pH=6.5±0.5, consisting of a mixture of polycarboxylate polymers: polycarboxylate polymer based on methacrylic acid with density ρ=0.95 g/cm³ and pH=7±0.5, polycarboxylate polymer based on allyl ester and anhydrite of maleinic acid with density ρ=1.03 g/cm³ and pH=7±0.5; sodium gluconate, C₆H₁₁NaO₇; sodium formate (HCOONa) and water at the following component ratio, wt %: polycarboxylate polymer based on methacrylic acid with density ρ=0.95 g/cm³ and pH=7±0.5 - 11.0-14.0; polycarboxylate polymer based on allyl ester and anhydride of maleinic acid with density ρ=1.03 g/cm³ and pH=7±0.5 - 10.0-10.5; sodium gluconate, C₆H₁₁NaO₇ - 2.0-2.5; sodium formate (HCOONa) - 2.5-3.0; a SAS mixture based on ethoxylated fatty alcohols and branched alkyl sulphates with density ρ=1.03 g/cm³ and pH=7±1.0 - 8.5-9.0, water - 63.0-64.0 at the specified component ratio of a concrete mix for high-strength concrete.

EFFECT: increasing strength of concrete.

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