无碱无氯液体速凝剂聚合硅酸硫酸铝的制备及机理研究  

Study on the Preparation and Mechanism of Alkali-free and Chlorine-free Liquid Accelerator Polyaluminium Silicate Sulfates

作　　者：蒋敏[1] 杨春明[1] 尹成杰[1] 邓翠芬[1] 赵莉苹[1] 申娉 

机构地区：[1]湖南师范大学化学化工学院,中国长沙410081

出　　处：《湖南师范大学自然科学学报》2016年第2期35-42,共8页Journal of Natural Science of Hunan Normal University

基　　金：湖南省科技计划重点资助项目(2011GK2014);湖南省自然科学基金资助项目(06JJ4007)

摘　　要：利用"水解-嵌入聚合"作用将氟硅酸镁与自制聚合硫酸铝(PAS)反应并结合"水解-聚合-浓缩"同步工艺制得无碱无氯液体速凝剂聚合硅酸硫酸铝(PASS).实验结果表明,PASS速凝剂在7%掺量时接近喷射混凝土用速凝剂(JC477-2005)一级品的指标要求.并通过X-射线衍射(XRD)和扫描电子显微镜(SEM)对PASS速凝剂的促凝机理进行了研究.An alkali-free and chlorine-free accelerator liquid accelerator-polyaluminum silicate sulfate（ PASS）was prepared by hydrolysis and polymerization of magnesium silicofluoride within self-made polyaluminium sulfate matrix,coupled with the ＂hydrolysis-polymerization-concentration＂three-in-one technology. The influence of the mass ratio of magnesium silicofluoride to polyaluminium sulfate,reaction temperature and stirring speed on the performance of as-prepared liquid accelerator has also been investigated. Our experimental results show that the resultant liquid accelerator has the same quality close to the first-grade production of shortcrete accelerator standard JC477-2005 when the added amount of accelerator is 7. 0%. Comparative studies of cement slurry with added accelerator and blank sample at different hydration stages were conducted by XRD analysis and SEM techniques. A possible coagulation mechanism of liquid accelerator PASS was proposed based on above results.

关 键 词：聚合硫酸铝 氟硅酸镁 聚合硅酸硫酸铝 无碱无氯速凝剂 

分 类 号：TU528.042.1[建筑科学—建筑技术科学]