高适应性聚羧酸减水剂的制备及其性能研究

关键字：高,适应性,聚,羧酸,减,水剂,的,制备,及其,

（1.武汉三源特种建材有限责任公司，湖北 武汉  430065；2.武汉源锦建材科技有限公司，湖北 武汉  430065）

摘要：为了适应搅拌站原材料的多变及温度环境的变化，根据聚羧酸减水剂分子的可调控性，通过双官能团羧基取代部分单官能团羧基的思路，采用异戊烯醇聚氧乙烯醚、丙烯酸、马来酸酐、反式丁烯二酸共聚合成一种高适应性聚羧酸减水剂PCE-4。与市售同类产品M02进行对比。净浆测试表明，在8种不同水泥种类下，在0~40 ℃范围内，PCE-4的分散性良好，比M02具有更低的水泥种类和温度敏感性；混凝土试验表明，PCE-4对不同种类水泥的适应性优于市场同类产品M02。

关键词：聚羧酸减水剂；合成；高适应性；净浆流动度；混凝土性能

中图分类号：TU528.042+.2        文献标识码：A        文章编号：1001-702X（2019）07-0131-04

 

Research on synthesis and performance of high-adapted polycarboxylate superplasticizer

HU Quan1，XIA Xiujian2，LIU Cuizhi1，WANG Yuan2，WANG Suping1

（1.Wuhan Sanyuan Special Building Materials Co. Ltd.，Hubei 430065，China；

2.Wuhan Ujoin Building Material Technology Co. Ltd.，Hubei 430065，China）

Abstract：In order to adapt to the variety of materials and the sudden change of temperature environment in the mixing station，the idea of substituting some single functional group carboxylic group by bifunctional group carboxyl group was proposed according to the adjustability of polycarboxylate super plasticizer molecule structures. A highly adaptable water reducer PCE-4 was synthesized by copolymerization of isoprene polyoxyethylene ether（TPEG），acrylic acid（AA） and maleic anhydride （MAH）.

Compared with the market product M02，the paste test shows that the fluidity of the paste is good in the temperature range of 0~40 degree，and the paste has lower type of cement and temperature sensitivity than M02. PCE-4 is suitable for concrete，and its adaptability to concrete of different types is better than market sample M02.

Key words：polycarboxylate superplasticizer，synthesis，high-adaptation，fluidity of the paste，concrete properties