Effect of Ferric Oxide Doping on Structure and Reactivity of Alite with Multiple Impurities
Effect of Ferric Oxide Doping on Structure and Reactivity of Alite with Multiple Impurities
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三氧化二铁掺杂对多种杂质阿利特结构和反应活性的影响
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
WU Chunli
中科院分区：
文献类型：
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作者：
*ZHANG Wensheng;YE Jiayuan;WANG Zhiyong;WU Chunli
用X射线粉末衍射法、热释光和等温量热法分别研究了氧化铁(即Fe_2O_3)对典型阿利特在Na~+、K~+等同时存在下的结构和反应活性的影响。结果表明，阿利特晶型基本不变，晶格参数随Fe含量呈线性变化，在0.6%Fe_2O_3存在间断，这是由于Fe的柔性替代方式所致，符合Vegard定律。原来的热释光强度和水化反应活性大大降低。结果表明，水化反应活性与原始热释光呈正相关，主要发生在成核和生长过程中。这种现象可能是由于阿利特中储存的额外能量造成的。在此基础上，提出了Fe影响阿利特反应活性的机理。
The effect of ferric oxide(i.e., Fe2O3) on the structure and reactivity of typical alite in the simultaneous presence of Na+, K+, etc. was investigated by X-ray powder diffraction with the Rietveld method, thermoluminescence and isothermal calorimetry, respectively. The results show that there is no change on the polymorphic form of alite, the lattice parameter of alite varies linearly with iron content and has a discontinuity at 0.6% Fe2O3 due to the flexible substitution pattern of Fe, which follows the Vegard's law. The original thermoluminescence intensity and hydration reactivity were greatly decreased. It is demonstrated that there is a positive correlation between the hydration reactivity and the original thermoluminescence, which mainly pans out during the nucleation and growth process. This phenomenon could be due to the extra energy stored in alite. Based on these findings, the mechanism of how Fe affects the reactivity of alite was proposed.