Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-efficiency polycarboxylate-type water reducing agent with slump retaining property and mud resistance and preparation of high-efficiency polycarboxylate-type water reducing agent
The invention relates to the technical field of concrete admixtures, and relates to a slump-retaining and mud-resistant efficient polycarboxylic acid water reducer and a preparation method thereof.The preparation method comprises the following steps that an initiator reduction component, a chain transfer agent and deionized water are weighed and mixed to be uniform, and a solution A is prepared; weighing an unsaturated acid monomer, a slump-retaining functional monomer and a mud-resistant functional monomer, and mixing with deionized water to prepare a solution B; adding unsaturated polyether monomers and deionized water into the reactor; adding an initiator oxidation component into the reaction container at one time, uniformly dropwise adding the solution A and the solution B into the reaction container to start polymerization reaction, and cooling to room temperature after the reaction is finished; and adding a NaOH solution into the mixed solution after the reaction is finished until the pH value of the system is 6-7, thereby obtaining the water reducing agent. Compared with the prior art, the water-reducing agent has the advantages of high water-reducing rate, long slump retaining time, high adaptability to cement, convenience in synthesis and use and the like.
本发明涉及混凝土外加剂技术领域，涉及一种兼具保坍性和抗泥性的高效聚羧酸系减水剂及其制备，包括以下步骤：称取引发剂还原组分、链转移剂和去离子水混合均匀，配成A溶液；称取不饱和酸类单体、保坍型功能单体和抗泥型功能单体，与去离子水混合，配制B溶液；向反应器中加入不饱和聚醚单体和去离子水；向反应容器中一次性加入引发剂氧化组分，再将A溶液和B溶液均匀滴加入反应容器内开始聚合反应，反应结束后，冷却至室温；向反应结束的混合溶液中加入NaOH溶液至体系pH值为6‑7，即得到所述减水剂。与现有技术相比，本发明具减水率高、保坍时间长、与水泥适应性强、合成使用便捷等优点。
High-efficiency polycarboxylate-type water reducing agent with slump retaining property and mud resistance and preparation of high-efficiency polycarboxylate-type water reducing agent
The invention relates to the technical field of concrete admixtures, and relates to a slump-retaining and mud-resistant efficient polycarboxylic acid water reducer and a preparation method thereof.The preparation method comprises the following steps that an initiator reduction component, a chain transfer agent and deionized water are weighed and mixed to be uniform, and a solution A is prepared; weighing an unsaturated acid monomer, a slump-retaining functional monomer and a mud-resistant functional monomer, and mixing with deionized water to prepare a solution B; adding unsaturated polyether monomers and deionized water into the reactor; adding an initiator oxidation component into the reaction container at one time, uniformly dropwise adding the solution A and the solution B into the reaction container to start polymerization reaction, and cooling to room temperature after the reaction is finished; and adding a NaOH solution into the mixed solution after the reaction is finished until the pH value of the system is 6-7, thereby obtaining the water reducing agent. Compared with the prior art, the water-reducing agent has the advantages of high water-reducing rate, long slump retaining time, high adaptability to cement, convenience in synthesis and use and the like.
本发明涉及混凝土外加剂技术领域，涉及一种兼具保坍性和抗泥性的高效聚羧酸系减水剂及其制备，包括以下步骤：称取引发剂还原组分、链转移剂和去离子水混合均匀，配成A溶液；称取不饱和酸类单体、保坍型功能单体和抗泥型功能单体，与去离子水混合，配制B溶液；向反应器中加入不饱和聚醚单体和去离子水；向反应容器中一次性加入引发剂氧化组分，再将A溶液和B溶液均匀滴加入反应容器内开始聚合反应，反应结束后，冷却至室温；向反应结束的混合溶液中加入NaOH溶液至体系pH值为6‑7，即得到所述减水剂。与现有技术相比，本发明具减水率高、保坍时间长、与水泥适应性强、合成使用便捷等优点。
High-efficiency polycarboxylate-type water reducing agent with slump retaining property and mud resistance and preparation of high-efficiency polycarboxylate-type water reducing agent
一种兼具保坍性和抗泥性的高效聚羧酸系减水剂及其制备
SUN ZHENPING (Autor:in) / MU FANYUAN (Autor:in) / YANG HAIJING (Autor:in) / YANG JINGBIN (Autor:in) / ZOU SHUANG (Autor:in)
03.05.2024
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2022
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