硅酸盐学报

碳硫硅钙石和钙矾石的稳定性

作者：王志娟郭川川宋远明王波徐恵忠

关键词：硫酸盐侵蚀碳硫硅钙石钙矾石合成稳定性

分类号：TU528.2

出版年,卷(期):页码：2016,44(2):293-299

DOI：10.14062/j.issn.0454-5648.2016.02.16

摘要：

采用化学方法合成出纯的碳硫硅钙石和钙矾石，并对比研究了二者的稳定性。结果显示：钙矾石比碳硫硅钙石更易受到碳酸钠破坏；碳硫硅钙石与氯化钡几乎不发生反应，钙矾石则较易被氯化钡破坏；在碳化条件下，钙矾石较易分解，碳硫硅钙石则几乎没变化。碳硫硅钙石在碳酸钠或氯化钡溶液中的稳定性、热分解稳定性和碳化稳定性均明显高于钙矾石，可能是由于碳硫硅钙石结构中离子键和氢键强度高于钙矾石。

Pure thaumasite and ettringite were synthesized by a chemical method, and their stability was investigated. The results show that ettringite is more easily destroyed by sodium carbonate than thaumasite. Thaumasite can hardly react with barium chloride, while ettringite can be absolutely destroyed by barium chloride. Ettringite is more easily decomposed under carbonation condition, compared to thaumasite. The stability of thaumasite, i.e., damaging effects of chemical substances, thermal decomposition and carbonation, is superior to that of ettringite. This may be attributed to the stronger ionic bond and hydrogen bond of thaumasite, compared to those of ettringite.

基金项目：

国家自然科学基金(No.51272222)资助项目。

作者简介：

第一作者：王志娟(1975—)，女，硕士，讲师。E-mail: wangzhijuan1975@126.com 通信作者：宋远明(1974—)，男，博士，副教授。E-mail: ytusym@126.com

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