聚羧酸减水剂在碱激发矿渣胶凝材料中的研究进展

摘要/Abstract

摘要： 聚羧酸减水剂(PCE)为改善碱激发矿渣(AAS)胶凝材料的分散性能和工作性能提供了新途径。本文综述了PCE的分子结构和溶解度对AAS浆体分散性能和工作性能的影响,以及PCE对AAS的作用机制。马来酸酐合成的烯丙基聚氧乙烯醚聚羧酸减水剂(APEG PCE)结合钙离子能力比丙烯酸合成的APEG PCE强,分散性能更具有优势;甲基烯丙醇聚氧乙烯醚聚羧酸减水剂(HPEG PCE)酸醚比7,侧链长度7个环氧乙烷(EO)且具有更多的AAA(A=丙烯酸)和AAE(A=丙烯酸,E=甲基烯丙醇聚氧乙烯醚)的分子结构序列,对提高AAS浆体的流动度和工作性能有利;PCE 在AAS浆体中的溶解度和分散性能没有相关性。最后提出当前PCE在AAS胶凝材料中存在的问题和今后研究的方向,可推动建筑行业的绿色低碳化发展。

关键词: 聚羧酸减水剂, 分子结构, 碱激发矿渣, 溶解度, 分散性能, 工作性能

Abstract: Polycarboxylate superplasticizer (PCE) provides a new approach to improve the dispersity and workability of alkali-activated slag (AAS) cementitious materials. In this paper, the effects of PCE molecular structure and solubility on the dispersity, workability of AAS slurry, as well as the mechanism of PCE on AAS are reviewed. α-allyl-ω-hydroxy poly (ethylene glycol) ether (APEG)-based PCE (APEG PCE) synthesized by maleic anhydride has strong calcium ion binding ability and superior dispersity. The acid ether ratio of polyethylene glycol methallyl ether (HPEG)-based PCE (HPEG PCE) is 7, the side chain length is 7 epoxy ethane (EO), and the structural sequence with more AAA (A= acid monomer) and AAE (A= acid monomer, E= HPEG) is beneficial for improving the flowability and workability of AAS slurry. There is no correlation between the solubility and dispersity of PCE in AAS slurry. And the current research problems and future research directions of PCE in AAS cementitious materials to promote the green and low-carbon development of the construction industry are proposed.

Key words: polycarboxylate superplasticizer, molecular structure, alkali-activated slag, solubility, dispersity, workability

中图分类号:

TU528

李蒙蒙, 舒鑫, 韩方玉, 刘建忠, 杨勇. 聚羧酸减水剂在碱激发矿渣胶凝材料中的研究进展[J]. 硅酸盐通报, 2023, 42(10): 3432-3438.

LI Mengmeng, SHU Xin, HAN Fangyu, LIU Jianzhong, YANG Yong. Research Progress of Polycarboxylate Superplasticizer in Alkali-Activated Slag Cementitious Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(10): 3432-3438.

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