Effects of soluble magnesium on the structure of calcium silicate hydrate

被引：11
作者：
Tang, Yanjie [1 ,2 ]
Schollbach, Katrin [2 ]
Brouwers, H. J. H. [1 ,2 ]
Chen, Wei [1 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China
[2] Eindhoven Univ Technol, Dept Built Environm, NL-5612 AP Eindhoven, Netherlands
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 302卷
基金：
中国国家自然科学基金;
关键词：
Magnesium ions; Concentration; Elevated temperature; Calcium silicate hydrate; C-S-H; AREA DISTRIBUTIONS; POROUS SUBSTANCES; PORE VOLUME; CEMENT; TOBERMORITE; EXCHANGE; SEAWATER; CHLORIDE; MODEL;
D O I：
10.1016/j.conbuildmat.2021.124402
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper aims to investigate the impact of soluble magnesium on the structure of C-S-H formed at elevated temperature. Magnesium chloride hexahydrate, calcium oxide and silica fume were used in the preparation of Mg2+ modified C-S-H. The obtained solid and liquid samples of synthetic C-S-H were characterized with XRD, FTIR, TGA, etc. to investigate the structural features of Mg2+ modified C-S-H. Results show that the mineralogical compositions of the synthesized C-S-H are highly related to the initial concentration of Mg2+. Large additions of Mg(2+ )lead to the instability of C-S-H. Meanwhile, magnesium can be incorporated into the structure of C-S-H. A heterogenous distribution of elemental Mg in C-S-H phase on nanoscale is observed.
引用
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页数：9
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