Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Reducing and slump retaining type polycarboxylic acid water reducing agent as well as preparation method and application of reducing and slump retaining type polycarboxylic acid water reducing agent
The invention discloses a shrinkage-reducing slump-retaining polycarboxylic acid water reducer and a preparation method and application thereof.The water reducer is formed by copolymerizing unsaturated polyether macromonomer, unsaturated acid monomer, shrinkage-reducing functional monomer and slump-retaining functional monomer in an aqueous solution system under the action of an initiator and a chain transfer agent, the molar ratio of the monomers is 1: (4-6): (2-5): (1-3 The preparation method is simple, safe, environment-friendly and suitable for industrial production, butyl acrylate and hydroxyethyl acrylate are grafted in PCE molecules of the prepared shrinkage-reducing and slump-retaining type polycarboxylic acid water reducer, and the prepared shrinkage-reducing and slump-retaining type polycarboxylic acid water reducer is small in mixing amount when applied to concrete, has high water reducing rate, shrinkage reducing characteristic and slump-retaining performance and does not need to be compounded with a shrinkage reducing agent, an expanding agent or a retarder.
本发明公开了一种减缩保坍型聚羧酸系减水剂、其制备方法及应用，该减水剂是在引发剂和链转移剂的作用下，由包括以下单体在水溶液体系中共聚而成：不饱和聚醚大单体、不饱和酸类单体、减缩型功能单体和保坍型功能单体，各单体摩尔比为1：4‑6：2‑5：1‑3。该制备方法简单，安全环保，适于工业化生产，制备得到的减缩保坍型聚羧酸系减水剂，PCE分子中接枝丙烯酸丁酯和丙烯酸羟乙酯，应用于混凝土时掺量少，兼具高减水率、减缩特性和保坍性能，无需复配减缩剂、膨胀剂或缓凝剂。
Reducing and slump retaining type polycarboxylic acid water reducing agent as well as preparation method and application of reducing and slump retaining type polycarboxylic acid water reducing agent
The invention discloses a shrinkage-reducing slump-retaining polycarboxylic acid water reducer and a preparation method and application thereof.The water reducer is formed by copolymerizing unsaturated polyether macromonomer, unsaturated acid monomer, shrinkage-reducing functional monomer and slump-retaining functional monomer in an aqueous solution system under the action of an initiator and a chain transfer agent, the molar ratio of the monomers is 1: (4-6): (2-5): (1-3 The preparation method is simple, safe, environment-friendly and suitable for industrial production, butyl acrylate and hydroxyethyl acrylate are grafted in PCE molecules of the prepared shrinkage-reducing and slump-retaining type polycarboxylic acid water reducer, and the prepared shrinkage-reducing and slump-retaining type polycarboxylic acid water reducer is small in mixing amount when applied to concrete, has high water reducing rate, shrinkage reducing characteristic and slump-retaining performance and does not need to be compounded with a shrinkage reducing agent, an expanding agent or a retarder.
本发明公开了一种减缩保坍型聚羧酸系减水剂、其制备方法及应用，该减水剂是在引发剂和链转移剂的作用下，由包括以下单体在水溶液体系中共聚而成：不饱和聚醚大单体、不饱和酸类单体、减缩型功能单体和保坍型功能单体，各单体摩尔比为1：4‑6：2‑5：1‑3。该制备方法简单，安全环保，适于工业化生产，制备得到的减缩保坍型聚羧酸系减水剂，PCE分子中接枝丙烯酸丁酯和丙烯酸羟乙酯，应用于混凝土时掺量少，兼具高减水率、减缩特性和保坍性能，无需复配减缩剂、膨胀剂或缓凝剂。
Reducing and slump retaining type polycarboxylic acid water reducing agent as well as preparation method and application of reducing and slump retaining type polycarboxylic acid water reducing agent
一种减缩保坍型聚羧酸系减水剂、其制备方法及应用
CAO YONG (Autor:in) / LIU GUISHUANG (Autor:in) / SUN HE (Autor:in) / HENG YONGSHENG (Autor:in) / WU DI (Autor:in) / ZHANG FANG (Autor:in) / PENG WENYU (Autor:in) / TANG GUOFANG (Autor:in) / LU CHUANTAI (Autor:in) / CHEN XIAOPENG (Autor:in)
20.12.2022
Patent
Elektronische Ressource
Chinesisch
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