摘要
在预制构件生产过程中,为较大幅度提高混凝土的早期强度,加快预制构件模板周转效率,并减少养护所需能源消耗,具有早强功能的聚羧酸减水剂得到了广泛的研究和应用。与无机盐类和有机醇胺类等早强剂不同,早强型聚羧酸减水剂作为一类高分子聚合物,具有单体选择范围宽、结构设计性强等特点。本文基于聚羧酸减水剂的分子结构出发,分别从增加聚醚侧链链长度和引入含有酰胺基团的早强型功能单体两个方面分析了早强型聚羧酸减水剂的研究现状及目前存在问题。最后,结合实际应用和发展需求,提出未来的研究方向,为新型早强型聚羧酸减水剂的设计开发提供思路。
In the production process of prefabricated components, in order to greatly increase the early strength of concrete, accelerate the turnover efficiency of prefabricated formwork, and reduce the energy consumption required for maintenance, polycarboxylate Superplasticizer with early strength function have been extensively studied and applied. Unlike early strength agents such as inorganic salts and organic alcohol amines,polycarboxylate Superplasticizer with early strength function, as a class of high-molecular polymers, have the characteristics of a wide selection of monomers and strong structural design. Based on the molecular structure of polycarboxylic superplasticizer, the paper analyzes research status and current problems of the early strength of polycarboxylic superplasticizer from the aspects of increasing the length of the polyether side chain and introducing the early-strength functional monomer containing amide groups.Combined with practical applications and development needs, the future research directions are proposed to provide ideas for the design and development of new type early-strength polycarboxylic superplasticizer.
作者
陈小龙
张金龙
熊旭峰
钟开红
CHEN Xiao-long;ZHANG Jin-long;XIONG Xu-feng;ZHONG Kai-hong(Guangzhou Institute of Building Science Co.,Ltd,Guangzhou 510440)
出处
《广州建筑》
2020年第1期15-19,共5页
GUANGZHOU ARCHITECTURE
基金
广州市建筑集团有限公司科技计划项目(2019-KJ020)
广州市建筑科学研究院有限公司科技进步资金项目(2017Y-KJ06)。
关键词
早强型聚羧酸减水剂
早期强度
侧链长度
功能单体
early-strength polycarboxylate superplasticizers
early strength
side chain length
functional monomer
