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A platform for research: civil engineering, architecture and urbanism
Polycarboxylate superplasticizer, concrete containing polycarboxylate superplasticizer and preparation method
The invention relates to the technical field of concrete and additives thereof, and provides a polycarboxylic acid water reducing agent, concrete containing the water reducing agent and a preparation method. According to the polycarboxylate superplasticizer, acrylic acid and sodium methallyl sulfonate are used as small monomers, and a triazine derivative connected with a C = C double bond,-COO-and a two-arm polyoxyethylene ether chain is used as a large monomer. Compared with a conventional polycarboxylate superplasticizer, the polycarboxylate superplasticizer can improve the anchoring effect of anions on the surfaces of cement particles, and can also increase the steric effect for hindering flocculation of the cement particles, so that the dispersing capacity on the cement particles can be obviously improved, the fluidity of cement paste is improved, and the flocculation of the cement particles is hindered; the slump loss of the concrete is reduced.
本发明涉及混凝土及其添加剂的技术领域，提供了一种聚羧酸减水剂、含该减水剂的混凝土及制备方法。本发明的聚羧酸减水剂，以丙烯酸、甲基丙烯磺酸钠为小单体，以连接了C＝C双键、‑COO‑及二臂聚氧乙烯醚链的三嗪衍生物为大单体。与常规聚羧酸减水剂相比，本发明的聚羧酸减水剂既可提高阴离子在水泥颗粒表面的锚固作用，又可增大阻碍水泥颗粒絮凝的位阻效应，因而可明显提高对水泥颗粒的分散能力，提高水泥浆体流动度，并且阻碍水泥颗粒絮凝，减小混凝土的坍落度损失。
Polycarboxylate superplasticizer, concrete containing polycarboxylate superplasticizer and preparation method
The invention relates to the technical field of concrete and additives thereof, and provides a polycarboxylic acid water reducing agent, concrete containing the water reducing agent and a preparation method. According to the polycarboxylate superplasticizer, acrylic acid and sodium methallyl sulfonate are used as small monomers, and a triazine derivative connected with a C = C double bond,-COO-and a two-arm polyoxyethylene ether chain is used as a large monomer. Compared with a conventional polycarboxylate superplasticizer, the polycarboxylate superplasticizer can improve the anchoring effect of anions on the surfaces of cement particles, and can also increase the steric effect for hindering flocculation of the cement particles, so that the dispersing capacity on the cement particles can be obviously improved, the fluidity of cement paste is improved, and the flocculation of the cement particles is hindered; the slump loss of the concrete is reduced.
本发明涉及混凝土及其添加剂的技术领域，提供了一种聚羧酸减水剂、含该减水剂的混凝土及制备方法。本发明的聚羧酸减水剂，以丙烯酸、甲基丙烯磺酸钠为小单体，以连接了C＝C双键、‑COO‑及二臂聚氧乙烯醚链的三嗪衍生物为大单体。与常规聚羧酸减水剂相比，本发明的聚羧酸减水剂既可提高阴离子在水泥颗粒表面的锚固作用，又可增大阻碍水泥颗粒絮凝的位阻效应，因而可明显提高对水泥颗粒的分散能力，提高水泥浆体流动度，并且阻碍水泥颗粒絮凝，减小混凝土的坍落度损失。
Polycarboxylate superplasticizer, concrete containing polycarboxylate superplasticizer and preparation method
聚羧酸减水剂、含该减水剂的混凝土及制备方法
ZHANG XIAN'AN (author)
2023-08-25
Patent
Electronic Resource
Chinese
| European Patent Office | 2021
| European Patent Office | 2022