Method to Stop Geopolymer Reaction

被引：66
作者：
Chen, Xu [1 ]
Meawad, Amr [2 ]
Struble, Leslie J. [1 ]
机构：
[1] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA
[2] Helwan Univ, Dept Chem, Fac Sci, Cairo 11795, Egypt
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2014年 / 97卷 / 10期
基金：
美国国家科学基金会;
关键词：
FLY-ASH; SETTING TIME; CEMENT; GEL; RESISTANCE; KINETICS; SI-29; FTIR; SLAG;
D O I：
10.1111/jace.13071
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The objective of this study was to develop a method to stop geopolymer reaction at early ages so that the molecular structure can be determined and its link to setting behavior probed. Solvent extraction, using a mixture of alcohol and acetone to remove water, was seen to suspend reaction up to at least 53h, allowing enough time for nuclear magnetic resonance (NMR) tests to determine structure. However, this method caused precipitation of soluble species present at early ages, confounding interpretation of the spectra and thus making it suitable only for mature geopolymers. A combination of water treatment to extract soluble species and solvent treatment to extract water was seen to stop the geopolymer reaction long enough (> 1week) for NMR tests in specimens with and without calcium.
引用
收藏
页码：3270 / 3275
页数：6
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