Effects of soluble magnesium on the structure of calcium silicate hydrate

被引：12

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

页数：9

共 44 条

[41] Rheological properties, compressive strength, hydration products and microstructure of seawater-mixed cement pastes [J].