改性聚羧酸减水剂的研发与应用  

Development and application of modified polycarboxylic acid water reducer

作　　者：樊伟 王雪敏 吴志刚 刘伟 郭诚 张孝伍 杨雪超 FAN Wei;WANG Xuemin;WU Zhigang;LIU Wei;GUO Cheng;ZHANG Xiaowu;YANG Xuechao(Tianjin Yejian Special Materials Co.Ltd.,Tianjin 301914,China;MCC Architectural Research Institute Co.Ltd.,Beijing 100089,China)

机构地区：[1]天津冶建特种材料有限公司,天津301914 [2]中冶建筑研究院有限公司,北京100089

出　　处：《新型建筑材料》2022年第5期10-12,32,共4页New Building Materials

基　　金：国家重点研发计划项目(2019YFC1904103)。

摘　　要：采用2-萘酚-3,6-二磺酸对异丁烯基聚氧乙烯醚进行改性,然后与丙烯酸共聚合成了一种TC型聚羧酸减水剂,并对其机理进行了分析。试验结果表明:与普通型聚羧酸减水剂相比,TC型聚羧酸减水剂在不降低分散性的基础上,在混凝土体系中具有较好的持久锁水性,可有效弥补普通型聚羧酸减水剂因过掺导致的混凝土离析、泌水等问题,且具有良好的抗泥性。Isobutenyl polyoxyethylene ether was modified by 2-naphthol-3,6-disulfonic acid,then a TC type polycarboxylic acid water reducer was copolymerized with acrylic acid,and its mechanism was analyzed.The test results show that compared with the traditional type,on the basis of not reducing the dispersion performance,TC type polycarboxylic acid water reducer has lasting water locking property in the concrete system,which effectively makes up for the problems of concrete segregation and bleeding caused by over mixing of the traditional polycarboxylic acid water reducer.It also has good mud resistant property.

关 键 词：2-萘酚-3 6-二磺酸 聚羧酸减水剂 分散性 保水性 抗泥性 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]