Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-sensitivity ester polycarboxylic acid slump retaining agent as well as preparation method and application thereof
The invention relates to the technical field of concrete admixtures, in particular to a low-sensitivity ester polycarboxylic acid slump retaining agent as well as a preparation method and application thereof. The low-sensitivity ester polycarboxylic acid slump retaining agent comprises a polyester structural unit, a carboxylic acid structural unit, an esterification functional structural unit and a carboxylic acid hydroxyl ester structural unit. The preparation method is characterized in that an esterification functional monomer and a carboxylic acid hydroxyl ester monomer with specific structures are subjected to free radical copolymerization with an unsaturated polyester monomer and an unsaturated carboxylic acid monomer, so that the obtained polycarboxylic acid slump retaining agent can reduce the sensitivity of concrete, reduce the slump loss, improve the workability of the concrete and improve the mud resistance; the workability is improved, the sensitivity to raw material changes is reduced, pumping of machine-made sand concrete, pumping concrete and the like is facilitated, pumping construction of the concrete is achieved, and the concrete construction efficiency is effectively improved.
本发明涉及混凝土外加剂技术领域，特别涉及一种低敏感酯类聚羧酸保坍剂及其制备方法和应用。所述低敏感酯类聚羧酸保坍剂包括聚酯结构单元、羧酸结构单元、酯化功能结构单元以及羧酸羟基酯结构单元。本发明的关键在于将具有特定结构的酯化功能单体和羧酸羟基酯单体与不饱和聚酯单体及不饱和羧酸单体进行自由基共聚，由此所得聚羧酸保坍剂可降低混凝土敏感度，减少坍落度损失，并改善混凝土的和易性，改善抗泥性能，提升和易性，降低对原材料变化的敏感性，有利于机制砂混凝土、泵送混凝土等的泵送，实现混凝土的泵送施工，有效提高混凝土施工效率。
Low-sensitivity ester polycarboxylic acid slump retaining agent as well as preparation method and application thereof
The invention relates to the technical field of concrete admixtures, in particular to a low-sensitivity ester polycarboxylic acid slump retaining agent as well as a preparation method and application thereof. The low-sensitivity ester polycarboxylic acid slump retaining agent comprises a polyester structural unit, a carboxylic acid structural unit, an esterification functional structural unit and a carboxylic acid hydroxyl ester structural unit. The preparation method is characterized in that an esterification functional monomer and a carboxylic acid hydroxyl ester monomer with specific structures are subjected to free radical copolymerization with an unsaturated polyester monomer and an unsaturated carboxylic acid monomer, so that the obtained polycarboxylic acid slump retaining agent can reduce the sensitivity of concrete, reduce the slump loss, improve the workability of the concrete and improve the mud resistance; the workability is improved, the sensitivity to raw material changes is reduced, pumping of machine-made sand concrete, pumping concrete and the like is facilitated, pumping construction of the concrete is achieved, and the concrete construction efficiency is effectively improved.
本发明涉及混凝土外加剂技术领域，特别涉及一种低敏感酯类聚羧酸保坍剂及其制备方法和应用。所述低敏感酯类聚羧酸保坍剂包括聚酯结构单元、羧酸结构单元、酯化功能结构单元以及羧酸羟基酯结构单元。本发明的关键在于将具有特定结构的酯化功能单体和羧酸羟基酯单体与不饱和聚酯单体及不饱和羧酸单体进行自由基共聚，由此所得聚羧酸保坍剂可降低混凝土敏感度，减少坍落度损失，并改善混凝土的和易性，改善抗泥性能，提升和易性，降低对原材料变化的敏感性，有利于机制砂混凝土、泵送混凝土等的泵送，实现混凝土的泵送施工，有效提高混凝土施工效率。
Low-sensitivity ester polycarboxylic acid slump retaining agent as well as preparation method and application thereof
一种低敏感酯类聚羧酸保坍剂及其制备方法和应用
KE YULIANG (Autor:in) / YANG HAO (Autor:in) / ZHONG LINA (Autor:in) / DONG LIWEI (Autor:in) / CHEN ZHANHUA (Autor:in)
15.03.2024
Patent
Elektronische Ressource
Chinesisch
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