Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Viscosity-reducing water-retention polycarboxylic acid water reducer and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to a viscosity-reducing and water-retaining polycarboxylic acid water reducer and a preparation method thereof. The viscosity-reducing water-retention type polycarboxylic acid water reducer is prepared by copolymerizing unsaturated polyether monomers, unsaturated acid, crosslinking monomers, unsaturated hydroxyl ester and esterification products, the esterification product is obtained by carrying out esterification reaction on gallic acid and unsaturated acid containing a rigid ring group. The 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 concrete and the like, realizes pumping construction of the high-strength concrete, effectively improves the concrete construction efficiency, can improve the workability of the concrete, and avoids the problems of layering, bleeding and the like of the concrete; the slump retaining property of the concrete can be improved, and the slump loss time of the concrete can be prolonged.
本发明涉及混凝土外加剂技术领域，特别涉及一种降粘保水型聚羧酸减水剂及其制备方法。该降粘保水型聚羧酸减水剂由不饱和聚醚单体、不饱和酸、交联单体、不饱和羟基酯和酯化产物共聚制得；所述酯化产物由没食子酸与含刚性环基团不饱和酸经酯化反应得到。该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；且保水性能好，能够提高混凝土的保坍性能，延长混凝土坍损时间。
Viscosity-reducing water-retention polycarboxylic acid water reducer and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to a viscosity-reducing and water-retaining polycarboxylic acid water reducer and a preparation method thereof. The viscosity-reducing water-retention type polycarboxylic acid water reducer is prepared by copolymerizing unsaturated polyether monomers, unsaturated acid, crosslinking monomers, unsaturated hydroxyl ester and esterification products, the esterification product is obtained by carrying out esterification reaction on gallic acid and unsaturated acid containing a rigid ring group. The 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 concrete and the like, realizes pumping construction of the high-strength concrete, effectively improves the concrete construction efficiency, can improve the workability of the concrete, and avoids the problems of layering, bleeding and the like of the concrete; the slump retaining property of the concrete can be improved, and the slump loss time of the concrete can be prolonged.
本发明涉及混凝土外加剂技术领域，特别涉及一种降粘保水型聚羧酸减水剂及其制备方法。该降粘保水型聚羧酸减水剂由不饱和聚醚单体、不饱和酸、交联单体、不饱和羟基酯和酯化产物共聚制得；所述酯化产物由没食子酸与含刚性环基团不饱和酸经酯化反应得到。该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；且保水性能好，能够提高混凝土的保坍性能，延长混凝土坍损时间。
Viscosity-reducing water-retention polycarboxylic acid water reducer and preparation method thereof
一种降粘保水型聚羧酸减水剂及其制备方法
LIU BOBO (Autor:in) / KE YULIANG (Autor:in) / YANG HAO (Autor:in) / YU KANGJIAN (Autor:in) / YANG YINGGANG (Autor:in)
11.03.2022
Patent
Elektronische Ressource
Chinesisch
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