Solvent exchange in sulphoaluminate phases. Part I: ettringite
Solvent exchange in sulphoaluminate phases. Part I: ettringite
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DOI：
10.1680/adcr.12.00042
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发表时间：
2013-12-01
影响因子：
2
通讯作者：
Alizadeh, Rouhollah
中科院分区：
文献类型：
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作者：
Khoshnazar, Rahil;Raki, Laila;Alizadeh, Rouhollah
研究了有机溶剂交换法对钙矾石微观结构的影响及伴随的体积变化。调节到11%的相对湿度的钙矾石样品处理与甲醇，乙醇和异丙醇，并使用不同的分析技术（X-射线衍射，傅里叶变换红外光谱，热重分析，扫描电子显微镜和氮BET比表面积测量）进行检查，探索使用这些有机溶剂在研究钙矾石微观结构的局限性。结果表明，甲醇与钙矾石相互作用，因此不推荐用于表征该硫铝酸盐相。乙醇和异丙醇并没有显着改变钙矾石的晶体结构，但确实导致了更高的表面积的处理过的样品相比，未处理的表面积。还测定了这些醇中钙矾石的长度变化，并给出了结果。
The change in the microstructure of ettringite and concomitant changes in volume due to the application of organic solvent exchange methods were investigated. Ettringite samples conditioned to 11% relative humidity were treated with methanol, ethanol and iso-propanol, and were examined using different analytical techniques (x-ray diffraction, Fourier transform infrared spectroscopy, thermal gravimetric analysis, scanning electron microscopy and nitrogen BET surface area measurement) to explore the limitations of using these organic solvents in the study of ettringite microstructure. The results suggest that methanol interacts with ettringite and therefore is not recommended for characterisation of this sulphoaluminate phase. Ethanol and iso-propanol did not significantly change the crystalline structure of ettringite, but did result in a higher surface area of the treated sample compared with the surface area of the untreated one. The length-change of ettringite in these alcohols was also determined and the results are presented.