摘要:
The invention relates to a hydroxide aqueous suspension of at least one selected transition element of which the potential oxidation reduction is less than that of the pair CrO72−/CrO42− (−0.12 V) having a pH between 2 and 11, limits excluded, for reducing the content of chrome VI of cement to a value no greater than 2 ppm. The suspension is characterized in that it contains 0.5 to 80 % by wt. of dry material of hydroxide of at least one transition element with regard to the quantity of water and in that it is stabilized by a hydrosoluble stabilizer. This suspension makes it possible to reduce the content of chrome VI of cements to a value no greater than 2 ppm.
摘要:
The invention relates to the use of polycarboxylates of polyoxyalkylene for the production of compositions of concrete wit a slump value T0 of between 12 and 20 cm inclusive, for improving the retention of fluidity with time. The invention further relates to fresh concrete compositions with such a slump value containing said dispersant.
摘要:
The invention relates to compositions intended to be applied to the surfaces of freshly poured mortars and/or concretes, before the beginning of the setting, in order simultaneously to prevent the evaporation of the water present in said mortars and/or concretes, which is necessary for their setting and then for their hardening, and in order to create, on said treated surfaces, high adhesiveness for the finishing materials intended to cover them, these compositions being provided in the form of aqueous emulsions comprising at least one paraffin wax (a), alone or in combination with at least one hydrocarbon compound (b) and/or with at least one other hydrocarbon compound (c) different from the hydrocarbon compound (b), and also comprising at least one latex (d) formed of a colloidal aqueous emulsion of at least one polymer, and at least one pulverulent inorganic or organic filler (e).
摘要:
The invention relates to a hydroxide aqueous suspension of at least one selected transition element of which the potential oxidation reduction is less than that of the pair CrO72−/CrO42− (−0.12 V) having a pH between 2 and 11, limits excluded, for reducing the content of chrome VI of cement to a value no greater than 2 ppm. The suspension is characterized in that it contains 0.5 to 80% by wt. of dry material of hydroxide of at least one transition element with regard to the quantity of water and in that it is stabilized by a hydrosoluble stabilizer. This suspension makes it possible to reduce the content of chrome VI of cements to a value no greater than 2 ppm.
摘要:
The invention relates to compositions intended to be applied to the surfaces of freshly poured mortars and/or concretes, before the beginning of the setting, in order simultaneously to prevent the evaporation of the water present in said mortars and/or concretes, which is necessary for their setting and then for their hardening, and in order to create, on said treated surfaces, high adhesiveness for the finishing materials intended to cover them, these compositions being provided in the form of aqueous emulsions comprising at least one paraffin wax (a), alone or in combination with at least one hydrocarbon compound (b) and/or with at least one other hydrocarbon compound (c) different from the hydrocarbon compound (b), and also comprising at least one latex (d) formed of a colloidal aqueous emulsion of at least one polymer, and at least one pulverulent inorganic or organic filler (e).
摘要:
The invention relates to compositions intended to be applied to surfaces of freshly poured mortar and/or concrete mixes, before the start of setting, in order to prevent the evaporation of water needed for them to set and harden, which are distinguished by the fact that, for the purpose of making them synergistic with regard to water retention, they are composed, in the form of aqueous emulsions, of: a) at least one petroleum-derived or synthetic paraffin wax containing, as a mixture, saturated and unsaturated aliphatic hydrocarbons of general formulae CnH2n+2 and CnH2n for which n is at least equal to 30 and the melting point of which is between 40° C. and 75° C.; b) at least one linear and/or cyclic hydrocarbon oil, of aliphatic and/or naphthenic origin, which are hydrocarbon chains, by themselves or as a mixture, of general formulae CnH2n+2 and CnH2n for which n is less than 30, in a liquid state at room temperature; and/or c) at least one oil formed from at least one ester resulting from the condensation reaction between a saturated and/or unsaturated fatty acid and a monohydric, dihydric or trihydric alcohol.
摘要翻译:本发明涉及在开始凝固之前旨在应用于新浇注的砂浆和/或混凝土混合物的表面的组合物,以便防止它们凝固和固化所需的水的蒸发,其特征在于以下事实 为了使它们在保水性方面具有协同作用,它们以水性乳液的形式由以下组成:a)至少一种含有饱和和不饱和脂族烃作为混合物的石油衍生或合成石蜡 通式为C n H 2n + 2和C n H 2n 2n,其中n至少等于 30,其熔点在40℃和75℃之间; b)脂族和/或环烷烃起始的至少一种线性和/或环状烃油,它们是烃链,它们本身或作为通式C n H 2n的混合物 在室温下处于液体状态,其中n小于30的+2和C n H 2n H 2n 和/或c)由饱和和/或不饱和脂肪酸与一元二羟基或三元醇之间的缩合反应产生的至少一种酯形成的至少一种油。
摘要:
The invention relates to compositions intended to be applied to the surfaces of freshly poured mortars and/or concretes, before the beginning of the setting, in order simultaneously to prevent the evaporation of the water present in said mortars and/or concretes, which is necessary for their setting and then for their hardening, and in order to create, on said treated surfaces, high adhesiveness for the finishing materials intended to cover them, these compositions being provided in the form of aqueous emulsions comprising at least one paraffin wax (a), alone or in combination with at least one hydrocarbon compound (b) and/or with at least one other hydrocarbon compound (c) different from the hydrocarbon compound (b), and also comprising at least one latex (d) formed of a colloidal aqueous emulsion of at least one polymer, and at least one pulverulent inorganic or organic filler (e).
摘要:
The invention relates to compositions intended to be applied to surfaces of freshly poured mortar and/or concrete mixes, before the start of setting, in order to prevent the evaporation of water needed for them to set and harden, which are distinguished by the fact that, for the purpose of making them synergistic with regard to water retention, they are composed, in the form of aqueous emulsions, of: a) at least one petroleum-derived or synthetic paraffin wax containing, as a mixture, saturated and unsaturated aliphatic hydrocarbons of general formulae CnH2n+2 and CnH2n for which n is at least equal to 30 and the melting point of which is between 40° C. and 75° C.; b) at least one linear and/or cyclic hydrocarbon oil, of aliphatic and/or naphthenic origin, which are hydrocarbon chains, by themselves or as a mixture, of general formula CnH2n+2 and CnH2n for which n is less than 30, in a liquid state at room temperature; and/or c) at least one oil formed from at least one ester resulting from the condensation reaction between a saturated and/or unsaturated fatty acid and a monohydric, dihydric or trihydric alcohol.
摘要翻译:本发明涉及在开始凝固之前旨在应用于新浇注的砂浆和/或混凝土混合物的表面的组合物,以便防止它们凝固和固化所需的水的蒸发,其特征在于以下事实 为了使它们在保水性方面具有协同作用,它们以水性乳液的形式由以下组成:a)至少一种含有饱和和不饱和脂族烃作为混合物的石油衍生或合成石蜡 通式CnH2n + 2和CnH2n,其n至少等于30,其熔点在40℃和75℃之间; b)至少一种脂族和/或环烷烃原料的线性和/或环烃烃油,它们是烃链,它们本身或作为n为小于30的通式C n H 2n + 2和C n H 2n的混合物,在 在室温下呈液态; 和/或c)由饱和和/或不饱和脂肪酸与一元二羟基或三元醇之间的缩合反应产生的至少一种酯形成的至少一种油。
摘要:
The invention relates to compositions intended, to be applied to the surfaces of freshly poured mortars and/or concretes, before the beginning of the setting, in order simultaneously to prevent the evaporation of the water present in said mortars and/or concretes, which is necessary for their setting and then for their hardening, and in order to create, on said treated surfaces, high adhesiveness for the finishing materials intended to cover them, these compositions being provided in the form of aqueous emulsions comprising at least one paraffin wax (a), alone or in combination with at least one hydrocarbon compound (b) and/or with at least one other hydrocarbon compound (c) different from the hydrocarbon compound (b), and also comprising at least one latex (d) formed of a colloidal aqueous emulsion of at least one polymer, and at least one pulverulent inorganic or organic filler (e).
摘要:
The invention relates to compositions intended to be applied to surfaces of freshly poured mortar and/or concrete mixes, before the start of setting, in order to prevent the evaporation of water needed for them to set and harden, which are distinguished by the fact that, for the purpose of making them synergistic with regard to water retention, they are composed, in the form of aqueous emulsions, of: a) at least one petroleum-derived or synthetic paraffin wax containing, as a mixture, saturated and unsaturated aliphatic hydrocarbons of general formulae CnH2n+2 and CnH2n for which n is at least equal to 30 and the melting point of which is between 40° C. and 75° C.; b) at least one linear and/or cyclic hydrocarbon oil, of aliphatic and/or naphthenic origin, which are hydrocarbon chains, by themselves or as a mixture, of general formulae CnH2n+2 and CnH2n for which n is less than 30, in a liquid state at room temperature; and/or c) at least one oil formed from at least one ester resulting from the condensation reaction between a saturated and/or unsaturated fatty acid and a monohydric, dihydric or trihydric alcohol.
摘要翻译:本发明涉及在开始凝固之前旨在应用于新浇注的砂浆和/或混凝土混合物的表面的组合物,以便防止它们凝固和固化所需的水的蒸发,其特征在于以下事实 为了使它们在保水性方面具有协同作用,它们以水性乳液的形式由以下组成:a)至少一种含有饱和和不饱和脂族烃作为混合物的石油衍生或合成石蜡 通式CnH2n + 2和CnH2n,其n至少等于30,其熔点在40℃和75℃之间; b)脂族和/或环烷烃起源的至少一种直链和/或环烷烃油,它们是烃链,它们本身或作为n为小于30的通式C n H 2n + 2和C n H 2n的混合物,在 在室温下呈液态; 和/或c)由饱和和/或不饱和脂肪酸与一元二羟基或三元醇之间的缩合反应产生的至少一种酯形成的至少一种油。