Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Solidification control composition for gelling systems
A set control composition for a gelling system comprising: a retarder (a) selected from the group consisting of (a-1) polymeric polycarboxylic acids selected from the group consisting of homopolymers and copolymers of alpha, beta-ethylenically unsaturated carboxylic acids; and at least one copolymer of an alpha, beta-ethylenically unsaturated carboxylic acid and at least one sulfo-containing monomer; and salts thereof, in which the milliequivalents of carboxyl groups are 3.0 meq/g or more, preferably 3.0 to 17.0 meq/g, and the molecular weight is 25,000 g/mol or less, assuming that all carboxyl groups are in an unneutralized form; (a-2) phosphonic acid and salts thereof; (a-3) low molecular weight polycarboxylic acids and salts thereof; and mixtures thereof; (b) (b-1) at least one of a borate source and (b-2) a carbonate source wherein the carbonate source is selected from the group consisting of an inorganic carbonate having a water solubility of 0.1 g.L <-1 > or more at 25 DEG C and an organic carbonate, the weight ratio of b) to a) being 0.1 to 10; (c) a polyol having at least three alcoholic hydroxyl groups in the molecule, the weight ratio of c) to a) being 0.2 to 4; and (d) a dispersant. The set control composition is effective to improve the processability of the gelling system without compromising early compressive strength over an extended period of time. The composition shows a sufficient open time (i.e., time until initial setting) within which it has good processability, such as sufficient slump fluidity over time, and has the characteristics of rapid setting, and the like. The invention also relates to a building composition comprising: i) a gelling binder comprising one or more calcium silicate mineral phases and one or more calcium aluminate mineral phases; ii) optionally, a foreign aluminate source; iii) a sulfate source; and iv) a coagulation control composition. The invention relates to a building composition containing 0.05 to 0.2 mol per 100 g of gelling binder i) of a total available aluminate from a calcium aluminate mineral phase and optionally a foreign aluminate source, calculated as Al (OH) 4-, and having a molar ratio of total available aluminate to sulfate of 0.4 to 2.0.
一种用于胶凝体系的凝固控制组合物，其包含：缓凝剂(a)，选自(a‑1)聚合多羧酸，其选自α,β‑烯键式不饱和羧酸的均聚物和共聚物；和至少一种α,β‑烯键式不饱和羧酸和至少一种含磺基单体的共聚物；以及其盐，其中，羧基的毫当量数为3.0meq/g或更高，优选3.0至17.0meq/g，并且分子量为25,000g/mol或更少，假定所有羧基均为未中和的形式；(a‑2)膦酸及其盐；(a‑3)低分子量多羧酸及其盐；和它们的混合物；(b)(b‑1)硼酸盐源和(b‑2)碳酸盐源中的至少一种，其中，碳酸盐源选自25℃下水溶性为0.1g·L‑1或更高的无机碳酸盐，以及有机碳酸酯，b)与a)的重量比为0.1至10；(c)分子中至少有3个醇式羟基的多元醇，c)与a)的重量比为0.2至4；和(d)分散剂。所述凝固控制组合物在延长的时间段内有效改善胶凝体系的可加工性而不损害早期抗压强度。所述组合物显示出足够的开放时间(即直至初始凝固的时间)，其在所述开放时间内具有良好的可加工性，例如随时间的推移具有足够的坍落流动度，并具备快速的凝固等特点。本发明还涉及一种建筑组合物，其包含：i)包含一种或多种硅酸钙矿物相和一种或多种铝酸钙矿物相的胶凝粘合剂；ii)任选地，外来的铝酸盐源；iii)硫酸盐源；和iv)凝固控制组合物。所述建筑组合物含有每100g胶凝粘合剂i)0.05至0.2mol的总可用铝酸盐，所述铝酸盐来自铝酸钙矿物相和任选地外来的铝酸盐源，以Al(OH)4–计算，并且总可用铝酸盐与硫酸盐的摩尔比为0.4至2.0。
Solidification control composition for gelling systems
A set control composition for a gelling system comprising: a retarder (a) selected from the group consisting of (a-1) polymeric polycarboxylic acids selected from the group consisting of homopolymers and copolymers of alpha, beta-ethylenically unsaturated carboxylic acids; and at least one copolymer of an alpha, beta-ethylenically unsaturated carboxylic acid and at least one sulfo-containing monomer; and salts thereof, in which the milliequivalents of carboxyl groups are 3.0 meq/g or more, preferably 3.0 to 17.0 meq/g, and the molecular weight is 25,000 g/mol or less, assuming that all carboxyl groups are in an unneutralized form; (a-2) phosphonic acid and salts thereof; (a-3) low molecular weight polycarboxylic acids and salts thereof; and mixtures thereof; (b) (b-1) at least one of a borate source and (b-2) a carbonate source wherein the carbonate source is selected from the group consisting of an inorganic carbonate having a water solubility of 0.1 g.L <-1 > or more at 25 DEG C and an organic carbonate, the weight ratio of b) to a) being 0.1 to 10; (c) a polyol having at least three alcoholic hydroxyl groups in the molecule, the weight ratio of c) to a) being 0.2 to 4; and (d) a dispersant. The set control composition is effective to improve the processability of the gelling system without compromising early compressive strength over an extended period of time. The composition shows a sufficient open time (i.e., time until initial setting) within which it has good processability, such as sufficient slump fluidity over time, and has the characteristics of rapid setting, and the like. The invention also relates to a building composition comprising: i) a gelling binder comprising one or more calcium silicate mineral phases and one or more calcium aluminate mineral phases; ii) optionally, a foreign aluminate source; iii) a sulfate source; and iv) a coagulation control composition. The invention relates to a building composition containing 0.05 to 0.2 mol per 100 g of gelling binder i) of a total available aluminate from a calcium aluminate mineral phase and optionally a foreign aluminate source, calculated as Al (OH) 4-, and having a molar ratio of total available aluminate to sulfate of 0.4 to 2.0.
一种用于胶凝体系的凝固控制组合物，其包含：缓凝剂(a)，选自(a‑1)聚合多羧酸，其选自α,β‑烯键式不饱和羧酸的均聚物和共聚物；和至少一种α,β‑烯键式不饱和羧酸和至少一种含磺基单体的共聚物；以及其盐，其中，羧基的毫当量数为3.0meq/g或更高，优选3.0至17.0meq/g，并且分子量为25,000g/mol或更少，假定所有羧基均为未中和的形式；(a‑2)膦酸及其盐；(a‑3)低分子量多羧酸及其盐；和它们的混合物；(b)(b‑1)硼酸盐源和(b‑2)碳酸盐源中的至少一种，其中，碳酸盐源选自25℃下水溶性为0.1g·L‑1或更高的无机碳酸盐，以及有机碳酸酯，b)与a)的重量比为0.1至10；(c)分子中至少有3个醇式羟基的多元醇，c)与a)的重量比为0.2至4；和(d)分散剂。所述凝固控制组合物在延长的时间段内有效改善胶凝体系的可加工性而不损害早期抗压强度。所述组合物显示出足够的开放时间(即直至初始凝固的时间)，其在所述开放时间内具有良好的可加工性，例如随时间的推移具有足够的坍落流动度，并具备快速的凝固等特点。本发明还涉及一种建筑组合物，其包含：i)包含一种或多种硅酸钙矿物相和一种或多种铝酸钙矿物相的胶凝粘合剂；ii)任选地，外来的铝酸盐源；iii)硫酸盐源；和iv)凝固控制组合物。所述建筑组合物含有每100g胶凝粘合剂i)0.05至0.2mol的总可用铝酸盐，所述铝酸盐来自铝酸钙矿物相和任选地外来的铝酸盐源，以Al(OH)4–计算，并且总可用铝酸盐与硫酸盐的摩尔比为0.4至2.0。
Solidification control composition for gelling systems
用于胶凝体系的凝固控制组合物
LORENZ KLAUS (Autor:in) / BANDIRA MICHAL (Autor:in) / HIMMELLEIN STEFAN (Autor:in) / SACHSENHAUSER BERND (Autor:in)
18.04.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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