Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ester-ether mixed viscosity-reducing polycarboxylic acid water reducer and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to an ester-ether mixed viscosity reduction type polycarboxylic acid water reducer and a preparation method thereof. The ester-ether mixed viscosity reduction type polycarboxylic acid water reducer is prepared by copolymerizing unsaturated polyether monomers, unsaturated acid, crosslinking monomers and esterification products, the esterification product is prepared by carrying out esterification reaction on gallic acid and an allyl alcohol monomer. The ester-ether mixed viscosity reduction type polycarboxylic acid water reducer can effectively reduce the viscosity of high-grade concrete, is beneficial to pumping of high-strength concrete, ultrahigh-strength concrete, UHPC (Ultra High Performance Concrete) and the like, realizes pumping construction of the high-strength concrete, and effectively improves the concrete construction efficiency; meanwhile, the workability of the concrete can be improved, and the problems of layering, bleeding and the like of the concrete are avoided; the slump retaining performance of the concrete can be improved, and the slump loss is reduced.
本发明涉及混凝土外加剂技术领域，特别涉及一种酯醚混合型降粘型聚羧酸减水剂及其制备方法。该酯醚混合型降粘型聚羧酸减水剂由不饱和聚醚单体、不饱和酸、交联单体和酯化产物共聚制得；所述酯化产物由没食子酸与烯丙基醇类单体经酯化反应制得。该酯醚混合型降粘型聚羧酸减水剂可有效降低高标号混凝土粘度，利于高强混凝土、超高强混凝土、UHPC混凝土等的泵送，实现高强混凝土的泵送施工，有效提高混凝土施工效率；同时其能够改善混凝土和易性，避免了混凝土出现分层、泌水等问题；且能够提高混凝土的保坍性能，减小坍落度损失。
Ester-ether mixed viscosity-reducing polycarboxylic acid water reducer and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to an ester-ether mixed viscosity reduction type polycarboxylic acid water reducer and a preparation method thereof. The ester-ether mixed viscosity reduction type polycarboxylic acid water reducer is prepared by copolymerizing unsaturated polyether monomers, unsaturated acid, crosslinking monomers and esterification products, the esterification product is prepared by carrying out esterification reaction on gallic acid and an allyl alcohol monomer. The ester-ether mixed viscosity reduction type polycarboxylic acid water reducer can effectively reduce the viscosity of high-grade concrete, is beneficial to pumping of high-strength concrete, ultrahigh-strength concrete, UHPC (Ultra High Performance Concrete) and the like, realizes pumping construction of the high-strength concrete, and effectively improves the concrete construction efficiency; meanwhile, the workability of the concrete can be improved, and the problems of layering, bleeding and the like of the concrete are avoided; the slump retaining performance of the concrete can be improved, and the slump loss is reduced.
本发明涉及混凝土外加剂技术领域，特别涉及一种酯醚混合型降粘型聚羧酸减水剂及其制备方法。该酯醚混合型降粘型聚羧酸减水剂由不饱和聚醚单体、不饱和酸、交联单体和酯化产物共聚制得；所述酯化产物由没食子酸与烯丙基醇类单体经酯化反应制得。该酯醚混合型降粘型聚羧酸减水剂可有效降低高标号混凝土粘度，利于高强混凝土、超高强混凝土、UHPC混凝土等的泵送，实现高强混凝土的泵送施工，有效提高混凝土施工效率；同时其能够改善混凝土和易性，避免了混凝土出现分层、泌水等问题；且能够提高混凝土的保坍性能，减小坍落度损失。
Ester-ether mixed viscosity-reducing polycarboxylic acid water reducer and preparation method thereof
一种酯醚混合型降粘型聚羧酸减水剂及其制备方法
KE YULIANG (Autor:in) / YANG HAO (Autor:in) / MIAO DONGHUI (Autor:in) / YU KANGJIAN (Autor:in) / CHEN CHANGJUN (Autor:in)
15.03.2022
Patent
Elektronische Ressource
Chinesisch
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