Self-levelling concrete and method for making a structural part

The method for making a vertical structural part comprising injecting into a framework, a self-leveling concrete of composition, comprising in weight, for cubic meter of concrete:

• about 350 to 600 kg/m3 of binder, of which 200 to 500 kg/m3 are cement,
• about 170 to 250 kg/m3 of water,
• about 0.5 to 4 kg/m3 of at least one antifoaming and/or thickening agent and/or admixture including at least one superplasticizer,
• cubic meter supplement, in weight, of granulates and solid particles of size smaller than or equal to 12 mm;
• wherein the superplasticizer is a compound (I) or a salt of said compound (I), wherein the compound has the formula:
• in which:
• R is a hydrogen atom or a saturated or unsaturated monovalent hydrocarbon group, comprising 1 to 18 carbon atoms and optionally one or several heteroatoms, 50% to 100% of the Ri are ethylene, the remaining 0 to 50% of Ri represent at least one alkylene selected from the group comprising ethylene, propylene, butylene, amylene, octylene, cyclohexene and arylene, whereby the Ri may include one or several heteroatoms;
• Q is a hydrocarbon group comprising 2 to 18 carbon atoms and optionally one or several heteroatoms;
• A is an alkylidene group comprising 1 to 3 carbon atoms;
• Rj are similar or different from another and can be selected from
• the A—PO3H2 group, wherein A is an alkylidene group comprising 1 to 3 carbon atoms,
• and the group
• B is an alkylene group comprising 2 to 8 carbon atoms and A is an alkylidene group comprising 1 to 3 carbon atoms,
• <<n>> is a number ranging from 20 and 250,
• <<r>> is the number of R—O(Ri—O)n groups of Rj,
• <<q>> is the number of R—O(Ri—O)n groups of Q,
• the sum <<r+q>> should not exceed 3,
• <<y>> is an integer equal to 1 or 2,
• Q, N and Rj may form together at least one ring, whereas the at least one ring may also comprise one or several additional heteroatoms.

The method for making a horizontal structural part, comprising injecting into a plane framework or on a particular ground, a self-leveling concrete of composition, comprising in weight, for cubic meter of concrete:

• about 350 to 600 kg/m3 of binder, of which 200 to 500 kg/m3 are cement,
• about 170 to 250 kg/m3 of water,
• about 0.5 to 4 kg/m3 of at least one antifoaming and/or thickening agent and/or admixture including at least one superplasticizer,
• cubic meter supplement, in weight, of granulates and solid particles of size smaller than or equal to 12 mm;
• wherein the superplasticizer is a compound (I) or a salt of said compound (I), wherein the compound has the formula:
• in which:
• R is a hydrogen atom or a saturated or unsaturated monovalent hydrocarbon group, comprising 1 to 18 carbon atoms and optionally one or several heteroatoms, 50% to 100% of the Ri are ethylene, the remaining 0 to 50% of Ri represent at least one alkylene selected from the group comprising ethylene, propylene, butylene, amylene, octylene, cyclohexene and arylene, whereby the Ri may include one or several heteroatoms;
• Q is a hydrocarbon group comprising 2 to 18 carbon atoms and optionally one or several heteroatoms;
• A is an alkylidene group comprising 1 to 3 carbon atoms;
• Rj are similar or different from another and can be selected from
• the A—PO3H2 group, wherein A is an alkylidene group comprising 1 to 3 carbon atoms,
• and the group
• B is an alkylene group comprising 2 to 8 carbon atoms and A is an alkylidene group comprising 1 to 3 carbon atoms,
• <<n>> is a number ranging from 20 and 250,
• <<r>> is the number of R—O(Ri—O)n groups of Rj,
• <<q>> is the number of R—O(Ri—O)n groups of Q,
• the sum <<r+q>> should not exceed 3,
• <<y>> is an integer equal to 1 or 2,
• Q, N and Rj may form together at least one ring, whereas the at least one ring may also comprise one or several additional heteroatoms;
• wherein after injection a smoothing bar is applied regularly over the surface of the concrete in order to ensure surface evenness of the part.