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防沉剂对氟硅酸盐体系无碱速凝剂性能的影响

作者：张勇1，2，张小磊1，2，杨晓奇1，2，刘永胜3，王伟1，2，乔敏1，2，冉千平1，2

关键字：防沉剂,对,氟,硅酸盐,体系,无碱,速凝剂,性能,

　
（1.江苏苏博特新材料股份有限公司，江苏 南京  211103；
2.江苏省建筑科学研究院有限公司，高性能土木工程材料国家重点实验室，江苏 南京  210008；
3.中铁隧道集团有限公司，广东 广州  511455）
摘要：将自制防沉剂加入到氟硅酸盐体系无碱速凝剂中，研究了防沉剂添加量对无碱速凝剂稳定性、凝结时间、抗压强度和水泥适应性的影响。结果表明：防沉剂可有效提高氟硅酸盐体系无碱速凝剂的稳定性；加入适量防沉剂对水泥的凝结时间和胶砂抗压强度无不利影响，有利于无碱速凝剂的推广应用。
关键词：无碱速凝剂；氟硅酸盐；稳定性；氟硅酸镁
中图分类号：TU528.042        文献标识码：A        文章编号：1001-702X（2019）07-0126-02
 
Effects of rheological agent on properties of alkali-free accelerator with fluosilicate
ZHANG Yong1，2，ZHANG Xiaolei1，2，YANG Xiaoqi1，2，LIU Yongsheng3，WANG Wei1，2，QIAO Min1，2，RAN Qianping1，2
（1.Jiangsu Sobute New Materials Co. Ltd.，Nanjing 211103，China；
2.State Key Laboratory of High Performance Civil Engineering Materials，Jiangsu Research Institute of Building Science，Nanjing 211108，China；3.China Railway Tunnel Group Co. Ltd.，Guangzhou 511455，China）
Abstract：Alkali-free accelerator was prepared with fluosilicate，and then rheological agent was added into alkali-free accelerator as modifier. The influences of the dosage of rheological agent on stability of accelerator，setting time of cement paste and compressive strength of mortar as well as the adaptability with cement were investigated. The results showed that rheological agent could improve the stability of alkali-free accelerator. It had no adverse effect on the setting time of cement and the compressive strength of mortar，which was helpful for its polularization and application.
Key words：alkali-free accelerator，fluosilicate，stability，magnesium fluosilicate