Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Polycarboxylate superplasticizer, preparation method thereof and concrete
The invention discloses a polycarboxylate superplasticizer, a preparation method thereof and concrete, and relates to the field of concrete. The raw materials comprise unsaturated carboxylic acid, 4-hydroxybutyl vinyl polyoxyethylene ether, a first unsaturated polyether monomer, a chain transfer agent, an oxidizing agent, a reducing agent and a solvent, wherein the molecular weight of the 4-hydroxybutyl vinyl polyoxyethylene ether is 700-1200; the molecular weight of the first unsaturated polyether monomer is 2400 to 3000. Unsaturated polyether water aqua monomer 4-hydroxybutyl vinyl polyoxyethylene ether with the low molecular weight of 700-1200 and macromolecular polyether monomer with the molecular weight of 2400-3000 are copolymerized with carboxylic acid together, so that the thickness of a solvated water film layer formed by alternation of long and short side chains of the water reducer and water molecules is relatively small, and more free water can be released, so that the viscosity of concrete is reduced. The viscosity of high-grade concrete slurry can be obviously reduced, and meanwhile, the quantity of the concrete slurry is increased, so that the workability and flow velocity of the concrete are improved, and the wrapping property and other properties are improved.
本申请公开了一种聚羧酸减水剂及其制备方法及混凝土，涉及混凝土领域。其原料包括不饱和羧酸、4‑羟丁基乙烯基聚氧乙烯醚、第一不饱和聚醚单体、链转移剂、氧化剂、还原剂及溶剂，其中：所述4‑羟丁基乙烯基聚氧乙烯醚的分子量为700～1200；所述第一不饱和聚醚单体的分子量为2400～3000。将低分子量700～1200不饱和聚醚水剂单体4‑羟丁基乙烯基聚氧乙烯醚与2400～3000的大分子聚醚单体一起与羧酸共聚合，使得减水剂长短侧链交替，与水分子形成的溶剂化水膜层厚度较小，能够释放出更多的自由水，从而降低混凝土的粘度。可以显著降低高标号混凝土浆体粘度的同时提升混凝土浆体数量，从而提升混凝土和易性和流速，改善包裹性等性能。
Polycarboxylate superplasticizer, preparation method thereof and concrete
The invention discloses a polycarboxylate superplasticizer, a preparation method thereof and concrete, and relates to the field of concrete. The raw materials comprise unsaturated carboxylic acid, 4-hydroxybutyl vinyl polyoxyethylene ether, a first unsaturated polyether monomer, a chain transfer agent, an oxidizing agent, a reducing agent and a solvent, wherein the molecular weight of the 4-hydroxybutyl vinyl polyoxyethylene ether is 700-1200; the molecular weight of the first unsaturated polyether monomer is 2400 to 3000. Unsaturated polyether water aqua monomer 4-hydroxybutyl vinyl polyoxyethylene ether with the low molecular weight of 700-1200 and macromolecular polyether monomer with the molecular weight of 2400-3000 are copolymerized with carboxylic acid together, so that the thickness of a solvated water film layer formed by alternation of long and short side chains of the water reducer and water molecules is relatively small, and more free water can be released, so that the viscosity of concrete is reduced. The viscosity of high-grade concrete slurry can be obviously reduced, and meanwhile, the quantity of the concrete slurry is increased, so that the workability and flow velocity of the concrete are improved, and the wrapping property and other properties are improved.
本申请公开了一种聚羧酸减水剂及其制备方法及混凝土，涉及混凝土领域。其原料包括不饱和羧酸、4‑羟丁基乙烯基聚氧乙烯醚、第一不饱和聚醚单体、链转移剂、氧化剂、还原剂及溶剂，其中：所述4‑羟丁基乙烯基聚氧乙烯醚的分子量为700～1200；所述第一不饱和聚醚单体的分子量为2400～3000。将低分子量700～1200不饱和聚醚水剂单体4‑羟丁基乙烯基聚氧乙烯醚与2400～3000的大分子聚醚单体一起与羧酸共聚合，使得减水剂长短侧链交替，与水分子形成的溶剂化水膜层厚度较小，能够释放出更多的自由水，从而降低混凝土的粘度。可以显著降低高标号混凝土浆体粘度的同时提升混凝土浆体数量，从而提升混凝土和易性和流速，改善包裹性等性能。
Polycarboxylate superplasticizer, preparation method thereof and concrete
一种聚羧酸减水剂及其制备方法及混凝土
CAI YU (Autor:in) / WEI PENGLIANG (Autor:in) / CAI JIANWEN (Autor:in) / CHEN LUYI (Autor:in) / ZHOU YONGHONG (Autor:in) / ZHANG HUANHUAN (Autor:in)
03.12.2024
Patent
Elektronische Ressource
Chinesisch
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