THE SYSTEM NA2O-CAO-SIO2-H2O

被引：21
|
作者：
BROWN, PW
机构：
[1] Department of Materials Science, The Pennsylvania State University, University Park, Pennsylvania
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 11期
关键词：
diagrams; equilibrium; hydrates; phase equilibria; soda‐lime‐silica;
D O I：
10.1111/j.1151-2916.1990.tb06475.x
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：
A portion of the quaternary phase diagram for Na2O‐CaO‐SiO2‐H2O has been constructed. Plotting concentrations as their 10th roots allows compounds having solubilities which differ by several orders of magnitude to be represented on a single diagram. The compositional relationships among sodium‐substituted calcium silicate hydrate, calcium‐substituted sodium silicate hydrate, calcium bydroxide, a quaternary compound of approximate composition 0.25Na2O · CaO · SiO2· 3H2O, sodium hydroxide monohydrate, and miscellaneous sodium silicate hydrates are presented. The quaternary diagram constructed shows the quaternary compound to exist in equilibrium with sodium‐substituted calcium silicate hydrate and calcium hydroxide. Conditions in concrete pore solutions which favor the formation of this quaternary compound may also favor the occurrence of the alkali‐silica reaction. Copyright © 1990, Wiley Blackwell. All rights reserved
引用
收藏
页码：3457 / 3461
页数：5
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