铁相组分对铁相和高铁低钙水泥熟料水化性能及抗侵蚀性能影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (4): 1097-1102.

铁相组分对铁相和高铁低钙水泥熟料水化性能及抗侵蚀性能影响

高金瑞, 饶美娟, 张克昌, 邓青山

武汉理工大学,硅酸盐建筑材料国家重点实验室,武汉 430070

收稿日期:2020-11-13 修回日期:2021-01-21 出版日期:2021-04-15 发布日期:2021-05-11
通讯作者: 饶美娟,博士,副教授。E-mail:raomeijuanding@163.com
作者简介:高金瑞(1996—),男,硕士研究生。主要从事先进水泥基复合材料研究。E-mail:1321676352@qq.com
基金资助:
“十三五”国家重点研发项目(2016YFB0303501);国家自然科学基金青年基金(51709209)

Effect of Iron Phase Component on Hydration Performance and Corrosion Resistance of Iron Phase and High-Iron Low-Calcium Cement Clinker

GAO Jinrui, RAO Meijuan, ZHANG Kechang, DENG Qingshan

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2020-11-13 Revised:2021-01-21 Online:2021-04-15 Published:2021-05-11

摘要/Abstract

摘要： 随着国家海洋战略的提出,大量水泥基材料被应用到海洋工程建筑中,海洋环境对水泥基材料的侵蚀破坏也愈发受到人们的广泛关注。研究表明,水泥中的铁相具有较好的抗侵蚀性能,而铁相中Al₂O₃和Fe₂O₃的摩尔比(Al/Fe,下同)是影响铁相抗侵蚀性能的主要因素。本文设计并烧成了两种铁相单矿C₄AF和C₆A₂F(Al/Fe分别为1和2),以及铁相为C₄AF或C₆A₂F的高铁低钙硅酸盐水泥熟料(铁相质量分数均为20%)。通过对铁相单矿C₄AF和C₆A₂F,以及高铁低钙水泥熟料进行X射线衍射、水化热、抗压强度、抗硫酸盐侵蚀能力和固化氯离子能力等测试,探究Al/Fe对铁相单矿和高铁低钙水泥熟料各项性能的影响。结果表明,随着Al/Fe增大,铁相晶面间距变小,氯离子固化能力增强,而抗硫酸盐侵蚀能力有所下降。同时,熟料中铁相含量提高促进了C₃S的水化,且Al/Fe高的熟料促进效果更加明显。铁相的Al/Fe提高,水泥熟料的氯离子固化能力增强,而抗硫酸盐侵蚀性能下降则较小。

关键词: 铁相组分, 高铁低钙水泥熟料, 水化性能, 氯离子固化, 抗硫酸盐侵蚀

Abstract: With the development of marine construction engineering, a large number of cement-based materials have been applied to marine construction, and the impact of the marine environment on cement-based materials has also attracted more and more attention. Studies have shown that the iron phase in cement has good corrosion resistance, and the Al/Fe mole ratio of the iron phase is the main factor affecting the corrosion resistance of the iron phase. This paper designed and burned two kinds of iron phase single ore C₄AF and C₆A₂F (Al/Fe mole ratio were 1 and 2 respectively), and the high-iron low-calcium cement clinker with iron phase only containing C₄AF or C₆A₂F (the iron phase mass fraction were both 20%). Through X-ray diffraction, heat of hydration, compressive strength, resistance to sulfate attack and ability to cure chloride ion, the iron phase single ore C₄AF and C₆A₂F and the corresponding high-iron low-calcium cement clinker were tested to study Al/Fe mole ratio influence on the properties of iron phase single ore and high-iron low-calcium cement clinker. The results show that with the increase of Al/Fe mole ratio, the interplanar spacing of the iron phase becomes less, the chloride ion solidification ability is enhanced, and the sulfate corrosion resistance is reduced. At the same time, the increase of the iron phase content in the clinker promotes the hydration of C₃S, and the iron phase with high Al/Fe mole ratio has a better promotion effect. As the Al/Fe mole ratio of the iron phase increases, the chloride ion solidification ability of the cement clinker increases, while the sulfate corrosion resistance decreases less.

Key words: iron phase component, high-iron low-calcium cement clinker, hydration performance, chloride ion solidification, sulfate corrosion resistance

中图分类号:

TU528

高金瑞, 饶美娟, 张克昌, 邓青山. 铁相组分对铁相和高铁低钙水泥熟料水化性能及抗侵蚀性能影响[J]. 硅酸盐通报, 2021, 40(4): 1097-1102.

GAO Jinrui, RAO Meijuan, ZHANG Kechang, DENG Qingshan. Effect of Iron Phase Component on Hydration Performance and Corrosion Resistance of Iron Phase and High-Iron Low-Calcium Cement Clinker[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1097-1102.

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