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S3级混凝土专用缓释型聚羧酸减水剂的制备及性能研究
作者：蒋卓君
（科之杰新材料集团有限公司，福建 厦门 361101）
摘要：将自制的具有双层分散结构的不饱和单体（D1）与马来酸酐、丙烯酸-2-羟基乙酯、丙烯酸-2-羟基丙酯及4-羟丁基乙烯基聚氧乙烯基醚共聚得到一种坍落度等级为S3级的混凝土专用缓释型聚羧酸减水剂（PTX）。试验结果表明，与常规缓释型聚羧酸减水剂相比，PTX的初始减水分散效果和保坍效果更优，适用于S3级混凝土的减水和保坍。
关键词：聚羧酸减水剂；缓释型；合成；S3级混凝土；东南亚地区
中图分类号：TU528.042+.2 文献标识码：A 文章编号：1001-702X（2020）07-0073-03
Study on preparation and properties of slow-release type polycarboxylic superplasticizer for S3 concrete
JIANG Zhuojun
（KZJ New Materials Group Co. Ltd.，Xiamen 361101，China）
Abstract：Unsaturated monomer（D1） with double-layer dispersion structure was prepared by esterification of maleic anhydride with p-hydroxybenzoic acid，and then copolymerized with maleic anhydride，2-hydroxyethyl acrylate，2-hydroxypropyl acrylate and 4-hydroxybutyl vinyl polyoxyethylene ether to obtain a special slow-release type polycarboxylic superplasticizer（PTX） for S3 concrete.
The test results show that compared with conventional slow-release type polycarboxylic superplasticizer，PTX has better initial water-reducing and slump-retaining effect，and is more suitable for slump-retaining of S3 concrete.
Key words：polycarboxylic superplasticizer，slow-release type，synthesis，S3 concrete，southeast Asia