硅酸盐学报2018，Vol.46Issue(2)：218-223,6.DOI:10.14062/j.issn.0454-5648.2018.02.07
酯醚型聚羧酸减水剂的制备及性能
Synthesis and Properties of Ester Ether Copolymerization Polycarboxylate Superplasticizer
摘要
Abstract
The ester ether copolymer polycarboxylate superplasticizer (PCst) was synthesizedvia free radical copolymerization. Based on the analysis by infrared spectroscpy, the structure of PCst contains ester and ether side chains. The properties of PCst, ester type polycarboxylate superplasticizer (PCes) and ether type polycarboxylate superplasticizer (PCet) were investigated. The results indicate that the sequence for the fluidity of cement pastes with three different polycarboxylate superplasticizers (PC) is PCet > PCst > PCes. The cement pastes with PCet are easily bleeding, which is sensitive to the change of water consumption and mud content. The cement pastes with PCst and PCes have the excellent cohesiveness, which is less sensitive to the fluctuation of water consumption and mud content. For concrete, the sequenceincreased order for the water reducing rate for different polycarboxylates is PCet > PCst > PCes. However, the workability of fresh concrete mixed with PCet is slightly worse, and the slump loss is greater. The concrete mixture with PCes and PCst has an excellent workability and a less slump loss with time.关键词
聚羧酸系减水剂/酯醚共聚/分子结构/性能对比Key words
polycarboxylate superplasticizers/ester ether copolymerization/molecular structure/properties comparison分类
建筑与水利引用本文复制引用
何廷树,杨仁和,徐一伦,史琛,邹亚婷,李红艳,房佳斌..酯醚型聚羧酸减水剂的制备及性能[J].硅酸盐学报,2018,46(2):218-223,6.基金项目
陕西省工业攻关项目(2016GY—205). （2016GY—205）
