Patent ID: 6616755
Filing Date: 2003-09-09
Classification: C04B,E04F,E04G

Abstract:
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 Aâ€”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, <> is a number ranging from 20 and 250, <> is the number of Râ€”O(Riâ€”O)n groups of Rj, <> is the number of Râ€”O(Riâ€”O)n groups of Q, the sum <> should not exceed 3, <> 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.