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防沉劑對氟矽酸鹽體系無堿速凝劑性能的影響

作者:張勇1,2,張小磊1,2,楊曉奇1,2,劉永勝3,王偉1,2,喬敏1,2,冉千平1,2

關鍵字:防沉劑,對,氟,矽酸鹽,體系,無堿,速凝劑,性能,

 
(1.江蘇蘇博特新材料股份有限公司,江蘇 南京  211103;
2.江蘇省建築科學研究院有限公司,
高性能土木工程材料國家重點實驗室,江蘇 南京  210008;
3.中鐵隧道集團有限公司,廣東 廣州  511455)
摘要:将自制防沉劑加入到氟矽酸鹽體系無堿速凝劑中,研究了防沉劑添加量對無堿速凝劑穩定性、凝結時間、抗壓強度和水泥适應性的影響。結果表明:防沉劑可有效提高氟矽酸鹽體系無堿速凝劑的穩定性;加入适量防沉劑對水泥的凝結時間和膠砂抗壓強度無不利影響,有利于無堿速凝劑的推廣應用。
關鍵詞:無堿速凝劑;氟矽酸鹽;穩定性;氟矽酸鎂
中圖分類号:TU528.042        文獻标識碼:A        文章編号: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