碳硫硅钙石的化学定量分析  

Chemical Quantitative Analysis of Thaumasite

作　　者：宋远明[1] 赵宇 王志娟[1] SONG Yuanming;ZHAO Yu;WANG Zhijuan(School of Environmental and Material Engineering, Yantai University, Yantai 264005, China)

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：《建筑材料学报》2020年第6期1518-1523,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51272222)。

摘　　要：基于混凝土中含硫水化产物化学特性的差异,采用氯化钡和氯化钙溶液处理水泥水化浆体样品,将碳硫硅钙石(TSA)与其他含硫水化产物进行分离,进而测得TSA含量.结果表明:采用该方法测定的硫酸钠-硫化钙-单硫型水化硫铝酸钙(AFm)-石膏-钙矾石(AFt)-TSA混合物中的TSA含量,平均准确率可达92%以上;用该法定量测试了浸泡于硫酸盐溶液中水泥净浆试件的TSA含量,其含量顺序为硫酸镁>硫酸铝>硫酸钠.由此可见,用该化学定量法定量碳硫硅钙石可行而且可靠.Based on the difference of the chemical properties of the sulfur-containing hydrates in concrete,barium chloride and calcium chloride solution were used to treat the cement hydration slurry samples,the thaumasite was separated from other sulfur-containing hydration products and the content of the thaumasite was measured.The results show that the content of the thaumasite in the mixture of sodium sulfate,calcium sulfide,monosulphite,gypsum,ettringite and thaumasite is measured by this treatment,with the average accuracy is over 92%.The treatment is also used to quantify thaumasite in cement pastes cured in sulfate solutions,and the order of the content is magnesium sulfate>aluminum sulfate>sodium sulfate.It is shown that this quantitative chemical treatment is feasible and reliable for thaumasite quantification.

关 键 词：混凝土 碳硫硅钙石 定量方法 化学分析 

分 类 号：TU528.2[建筑科学—建筑技术科学]