碳硫硅钙石和钙矾石的稳定性  

Stability of Thaumasite and Ettringite

作　　者：王志娟[1] 郭川川[1] 宋远明[1] 王波[1] 徐恵忠 

机构地区：[1]烟台大学环境与材料工程学院,山东烟台264005

出　　处：《硅酸盐学报》2016年第2期292-298,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(No.51272222)资助项目

摘　　要：采用化学方法合成出纯的碳硫硅钙石和钙矾石,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.

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[建筑科学—建筑技术科学]