Gyrolite formation in CaO-SiO2•nH2O-γ-Al2O3-Na2O-H2O system under hydrothermal conditions

被引：0
作者：
Baltakys, K. [1 ]
Siauciunas, R. [1 ]
机构：
[1] Kaunas Univ Technol, Dept Silicate Technol, LT-50254 Kaunas, Lithuania
来源：
POLISH JOURNAL OF CHEMISTRY | 2007年 / 81卷 / 01期
关键词：
gyrolite; Z-phase; 1.13 nm tobermorite; pectolite; calcium-silicate-hydrate;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The influence of gamma-Al2O3 and Na2O additives on the gyrolite formation process in the CaO-SiO2-nH(2)O-H2O mixture has been examined. It has been proved that gamma-Al2O3 is not recommended for the synthesis of gyrolite, because Al3+ ions stimulate the formation of C-S-H(l) and 1.13 nm tobermorite (where C - CaO, S - SiO2 and H - H2O). Na2O positively affects the formation of gyrolite: this compound is formed already after 8 hours of isothermal curing at 200 degrees C. On the contrary, in the pure mixtures gyrolite formed after only 32 h at 200 degrees C. In order to compare the cation exchange activity of synthesized gyrolite with (Al+Na)-substituted tobermorite, the ion exchange experiments were employed as a test reaction.
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页码：103 / 114
页数：12
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