摘要
将乙二醇单乙烯基聚氧乙烯醚(EPEG)大单体与丙烯酸、丙烯酸羟乙酯通过自由基溶液共聚得到EPEG缓释型聚羧酸减水剂PCE-E,并分析了酸醚比、酯醚比、滴加时间等因素对PCE-E减水、缓释、保坍性能的影响。结果表明:当反应温度为20℃、酸醚比为2.10、酯醚比为2.9、引发剂用量为0.7%、还原剂用量为0.2%、催化剂用量为0.3%、链转移剂用量为0.4%、滴加时间为60 min时,制备得到的PCE-E综合性能最佳,在混凝土中的应用效果良好。
The ethylene glycol monovinyl polyoxyethylene ether(EPEG)macromonomer was copolymerized with acrylic acid and hydroxyethyl acrylate through free radical solution to obtain EPEG slow-release polycarboxylic superplasticizer PCE-E.The effects of acid ether ratio,ester ether ratio,dropping time and other factors on the water reducing,slow-release and slump retaining properties of PCE-E were analyzed.The results show that when the reaction temperature is 20℃,the ratio of acid to ether is 2.10,the ratio of ester to ether is 2.9,the amount of initiator is 0.7%,the amount of reductant is 0.2%,the amount of catalyst is 0.3%,the amount of chain transfer agent is 0.4%,and the dropping time is 60 min,the prepared PCE-E has the best comprehensive performance and good application effect in concrete.
作者
刘少兵
程绍娟
陈森章
林海阳
崔珊珊
杨国武
LIU Shao-bing;CHENG Shao-juan;CHEN Seng-zhang;LIN Hai-yang;CUI Shan-shan;YANG Guo-wu(School of Materials Science and Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China;Henan Fuluorui New Material Co.,Ltd.,Luoyang 471023,China;China Academy of Building Research Co.,Ltd.,Beijing 100013,China)
出处
《混凝土与水泥制品》
2023年第2期23-27,共5页
China Concrete and Cement Products
基金
河南省自然科学基金项目(162300410196)。
