二乙醇胺
氢氟酸
水泥
硫酸盐
碱金属
钙矾石
材料科学
铝
胺气处理
无机化学
化学工程
冶金
化学
有机化学
硅酸盐水泥
工程类
作者
Zhe Yu,Zhen Sun,Jun Tian,Yan Liang Ji,Min Pang
出处
期刊:Key Engineering Materials
日期:2021-02-01
卷期号:876: 45-50
被引量:2
标识
DOI:10.4028/www.scientific.net/kem.876.45
摘要
In this paper, the effects of various components in alkali-free accelerator on the setting of cement paste were studied, and the morphology of the hydrates during hydration was investigated with SEM. The experimental results show that the aluminum sulfate, diethanolamine and hydrofluoric acid can effectively shorten the setting time of cement paste, while excessive dosage has minimal impacts on the setting time. The diethanolamine and hydrofluoric acid can not only shorten the setting time but also can improve the stability of the accelerator. It was evidenced by the SEM that the aluminum sulfate accelerates cement coagulation by quickly forming a large amount of ettringite in the cement paste. The results in this study suggest that the shortest setting can be achieved when the dosage of aluminum sulfate, diethanolamine and hydrofluoric acid in a liquid alkali-free accelerator is 57 %, 5 % and 5.7 % , respectively.
科研通智能强力驱动
Strongly Powered by AbleSci AI