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采用化学试剂合成硅酸盐水泥熟料,应用X射线衍射结合Rietveld方法和差示扫描量热等,研究了MgO对熟料煅烧、矿物组成、阿利特晶型及熟料性能等的影响。结果表明:MgO在碳酸钙分解反应阶段已开始影响甚至参与了熟料烧成反应;MgO掺入使阿利特和铁铝酸四钙含量增多,贝利特和铝酸三钙含量相对降低;但当MgO掺量达到2%(固溶置换极限)及以上时,方镁石形成,熟料矿物组成基本不再变化;随着MgO的掺入,阿利特的晶型逐渐由M1型为主转变稳定为M3晶型。MgO掺量在1%附近时,靠近阿利特准同型相界处,熟料发展强度最高。
Abstract：The influence of magnesium oxide(Mg O) on the clinker formation, alite polymorphism and the hydration properties of clinker was investigated by X-ray powder diffraction with the Rietveld method and differential scanning calorimetry. The corresponding mechanisms were discussed. The results show that Mg O begins to affect the burning process of clinker from the decomposition of calcium carbonate. The contents of alite and ferrite increase, but the contents of belite and tricalcium aluminate of the clinker decrease. When the content of MgO is above 2%(the solid solution limit of MgO in clinker), periclase will be formed, but the contents of the four major clinker phases are basically the same. M3 type alite can be stabilized with the incorporation of MgO. With 1% MgO, which is around amorphotropic phase boundary of alite for M1 to M3, the clinker has the maximum strength.
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基本信息:
DOI：10.14062/j.issn.0454-5648.2019.08.15
中图分类号:TQ172.4
引用信息:
[1]任雪红,姚燕,张文生,等.MgO对熟料烧成及性能的影响机理[J].硅酸盐学报,2019,47(08):1137-1142.DOI:10.14062/j.issn.0454-5648.2019.08.15.
基金信息:
国家自然科学基金(51872272,51672260)资助项目
2019-06-21
2019-06-21
2019-06-21