CONCRETE WITH LOW CLINKER CONTENT Russian patent published in 2013 - IPC C04B7/52 C04B28/02 C04B40/00 

FIELD: chemistry.

SUBSTANCE: method of producing a wet concrete composition, including a step of mixing: portland clinker in form of grains having Dv97 from 10 to 30 mcm or having a Blaine specific surface of not less than 5300 cm²/g, preferably not less than 5500 cm²/g, the minimum quantity of the clinker in kg/m³ being determined according to formula (V) for clinker having Dv97 from 10 to 30 mcm, or according to formula (VI) for clinker having Blaine specific surface of not less than 5300 cm²/g: [(90 x ln(Dv97_k)) - 150] x (W_eff - 140) (V) wherein Dv97_k is Dv97 of clinker given in mcm, W_eff is the quantity of effective water in l/m³; [(-0.021 x BSS_k) + 263] x (W_eff - 140) (VI) wherein BSS_k is the Blaine specific surface of clinker given in cm²/g, W_eff is the quantity of effective water in l/m³; - slag, of which the minimum quantity in kg/m³ is determined according to formula (VII) in the case of a mixture with clinker having Dv97 from 10 to 30 mcm, or according to formula (VIII) in the case of a mixture with clinker having Blaine specific surface of not less than 5300 cm²/g: (3500 - BSS_S) x [-90 x ln(Dv97_k) + 310] x (W_eff - 140) (VII) wherein Dv97_k is the Dv97 of clinker given in mcm, BSS_S is the Blaine specific surface of slag given in cm²/g, (3500 - BSS_S) x [0.021x BSS_k - 103] x (W_eff - 140) (VIII) wherin BSS_k and BSS_S are respectively the Blaine specific surface of the clinker and the slag given in cm²/g, W_eff the quantity of effective water in l/m³; - calcium sulphate; additional materials having Dv90 of not more than 200 mcm, of which the minimum quantity in kg/m³ is determined according to the following formula (IX): 220- (quantity of slag)-(quantity of clinker)-(quantity of calcium sulphate); - 1500-2200 kg/m³, preferably, - 1700-2000 kg/m³ aggregates; plasticiser; - optionally an accelerator and/or an air-entraining agent and/or a thickening agent and/or a retarder and/or a clay-inhibiting agent; with 140-220 l/m³ of effective water, the total quantity of clinker in the wet concrete being not more than 200 kg/m³. The present invention also relates to a wet concrete composition obtained by mixing with water and an object made from the solidified concrete mix.

EFFECT: low consumption of clinker while preserving strength of the concrete.

4 cl, 4 ex, 4 dwg