醚酯共聚法制备减水保坍型聚羧酸减水剂及其性能研究
Study on preparation and performance of polycarboxylate superplasticizer with water-reducing and slump-preserving properties by ether-ester copolymerization
柯妮 1邓磊 2谢大银 1张波 2沈建荣1
作者信息
- 1. 科之杰新材料集团广西有限公司,广西 南宁 530100
- 2. 科之杰新材料集团(贵州)有限公司,贵州 黔南 551200
- 折叠
摘要
以丙烯酸羟乙酯(HEA)、异戊烯基聚氧乙烯醚(TPEG)、丙烯酸(AA)为主要原料,引入丙烯酸一缩二乙二醇酯(EGD),在45℃的氧化-还原体系下合成减水保坍型聚羧酸减水剂.结果表明,相对市售聚羧酸减水母液,该产品有更好的分散性和保坍能力,且自带引气效果,能有效改善混凝土和易性,提高混凝土抗压强度,综合性能更优.
Abstract
Using hydroxyethyl acrylate(HEA),isopentenyl polyoxyethylene ether(TPEG)and acrylic acid(AA)as the main raw materials,diethylene glycol acrylate(EGD)is introduced to synthesize a water-reducing and slump-preserving polycarboxylate superplasticizer in an oxidation-reduction system at 45℃.The results show that compared to the commercially available ordinary polycarboxylate superplasticizer mother liquor,this product not only has better dispersibility and slump retention ability,but also comes with an inherent air entraining effect,which can effectively improve the workability of concrete and increase its compressive strength and comprehensive performance.
关键词
醚酯共聚/聚羧酸减水剂/混凝土Key words
ether-ester copolymerization/polycarboxylate superplasticizer/concrete引用本文复制引用
出版年
2024
NETL
NSTL
万方数据