Rapid Quantitative lfiCation of Thaumasite

摘要：

　　To establish a quantitative identification method of thaumasite,internal doping method was used to accelerate thaumasite form of sulfate attack (TSA).A cement-limestone powder paste doped 10% of magnesium sulfate was immersed in water at (5±2) ℃,while the blank was in 10% magnesium sulfate solution (by weight).Paste corrosion products were analyzed by infrared spectrum (IR),thermal analysis,nuclear magnetic resonance (NMR),and X-ray diffraction (XRD)/Rietveld refinement methods.The results show that the thaumasite formation was successfully accelerated by internal doping method.A lot of thaumasite formed after 6-15 months low temperature sulfate attack with gray mud-like material.IR analysis is able to be used to analysis thaumasite qualitatively,and Rietveld refinement was suitable to quantitative analysis of thaumasite.A rapid quantitative identification method of thaumasite including visual inspection,IR spectrum and XRD/Rietveld refinement was also established which will improve the accuracy and rapidness of TSAs research.

关键词： Thaumasite Quantitative analysis Internal doping method Rietveld refinement Infrared spectrum

作者: Changcheng Li Yan Yao Ling Wang

作者单位: State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 186-192

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）