含锰中间相矿物形成及其固溶分布
发布时间：2018-07-26 06:42
【摘要】：采用第一性原理构建矿物结构模型,结合X射线衍射分析、熟料相分步萃取、环境扫描电镜等测试方法,研究了锰(Mn)离子在熟料中间相的离子固溶和晶格取代机理。结果表明:锰在水泥熟料矿物中的固溶倾向从高到低依次为C_4AF、C_3A、C_3S、C_2S,且优先取代C_4AF中六配位的Fe离子,降低了其Al/Fe比;熟料煅烧过程中,锰离子发生类质同象现象,以+3价形式固溶于C_4AF中,形成C_4AF-C_4AM连续固溶体,造成C_4AF衍射峰向低角度偏移、衍射峰数量减少,延缓了其水化反应活性,并主要以取代八面体配位Al离子的形式存在于钙矾石/单硫型硫铝酸盐中。
[Abstract]:The structure model of minerals was constructed by first principles. The mechanism of ionic solid solution and lattice substitution of manganese (Mn) ions in the mesophase of clinker was studied by means of X-ray diffraction (XRD), clinker phase step extraction and environmental scanning electron microscopy (SEM). The results show that the solution tendency of manganese in cement clinker minerals is C4AFA / C _ 3A / C _ 3S / C _ 2S, and the Fe ion of six coordination in C_4AF is replaced by Fe ion, and the Al/Fe ratio is reduced, and the similar phenomenon of manganese ion occurs during clinker calcination. The C_4AF-C_4AM continuous solid solution was formed by solid solution in C_4AF in the form of 3 valence, which caused the diffraction peak of C_4AF to shift to low angle, and the number of diffraction peaks decreased, which delayed the hydration reaction activity of C_4AF. And mainly in the form of substituted octahedron coordination Al ion in ettringite / monosulfur sulphoaluminate.
【作者单位】： 武汉理工大学硅酸盐建筑材料国家重点实验室;
【基金】：国家科技支撑计划资助项目(2012BAC15B04)
【分类号】：TQ172.4
本文编号：2145183
[Abstract]:The structure model of minerals was constructed by first principles. The mechanism of ionic solid solution and lattice substitution of manganese (Mn) ions in the mesophase of clinker was studied by means of X-ray diffraction (XRD), clinker phase step extraction and environmental scanning electron microscopy (SEM). The results show that the solution tendency of manganese in cement clinker minerals is C4AFA / C _ 3A / C _ 3S / C _ 2S, and the Fe ion of six coordination in C_4AF is replaced by Fe ion, and the Al/Fe ratio is reduced, and the similar phenomenon of manganese ion occurs during clinker calcination. The C_4AF-C_4AM continuous solid solution was formed by solid solution in C_4AF in the form of 3 valence, which caused the diffraction peak of C_4AF to shift to low angle, and the number of diffraction peaks decreased, which delayed the hydration reaction activity of C_4AF. And mainly in the form of substituted octahedron coordination Al ion in ettringite / monosulfur sulphoaluminate.
【作者单位】： 武汉理工大学硅酸盐建筑材料国家重点实验室;
【基金】：国家科技支撑计划资助项目(2012BAC15B04)
【分类号】：TQ172.4
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