硫酸亚铁对铝酸盐水泥浆体性能及水化产物的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (3): 844-850.

所属专题：水泥混凝土

硫酸亚铁对铝酸盐水泥浆体性能及水化产物的影响

张梦真^1,2, 娄广辉^1,2, 刘子娴³, 蔡基伟³, 许鸽龙³, 乔一佳^1,2, 张祥飞^1,2

1.河南建筑材料研究设计院有限责任公司,郑州 450002;
2.河南省科学院,郑州 450046;
3.河南大学开封市工程修复与材料循环工程技术研究中心,开封 475004

收稿日期:2023-09-27 修订日期:2023-11-28 出版日期:2024-03-15 发布日期:2024-03-27
作者简介:张梦真(1990—),女,工程师。主要从事新型建材和标准化研究。E-mail:jcgczx@126.com
基金资助:
河南省科学院2022年院基本科研费项目(220609097)

Effect of Ferrous Sulfate on Properties and Hydration Products of Aluminate Cement Paste

ZHANG Mengzhen^1,2, LOU Guanghui^1,2, LIU Zixian³, CAI Jiwei³, XU Gelong³, QIAO Yijia^1,2, ZHANG Xiangfei^1,2

1. Henan Building Materials Research and Design institute Co., Ltd., Zhengzhou 450002, China;
2. Henan Academy of Sciences, Zhengzhou 450046, China;
3. Kaifeng Research Center for Engineering Repair and Material Recycle, Henan University, Kaifeng 475004, China

Received:2023-09-27 Revised:2023-11-28 Online:2024-03-15 Published:2024-03-27

摘要/Abstract

摘要： 铁相对水泥混凝土耐久性具有显著的积极作用,为拓宽铁相来源,本文研究了铁盐对铝酸盐水泥性能及水化产物的影响。通过将铝酸盐水泥和硫酸盐(二水石膏和硫酸亚铁)复合,使铝酸盐水泥水化生成以钙矾石为主的产物,在此基础上,研究了硫酸盐中硫酸亚铁比例对铝酸盐水泥浆体凝结时间、抗压强度以及体积稳定性的影响规律,并采用XRD和SEM分析水化产物类型以及微观形貌,阐明硫酸亚铁对水泥浆体性能的影响机理。结果表明:适量的硫酸盐可提升铝酸盐水泥浆体的抗压强度;硫酸亚铁对铝酸盐水泥表现出轻微的促凝作用,对膨胀率具有显著的抑制作用;硫酸亚铁对钙矾石的形成具有明显的抑制作用,适量的硫酸亚铁使得所生成的钙矾石尺寸较小,且分布均匀,有利于提升硬化浆体的抗压强度。

关键词: 铝酸盐水泥, 硫酸盐, 硫酸亚铁, 钙矾石, 抗压强度, 膨胀性

Abstract: Iron phase has a significant positive effect on the durability of cement concrete. In order to broaden the sources of iron phase, the effects of iron salts on the properties and hydration products of aluminate cement were studied. The combination of aluminate cement and sulfate (gypsum and ferrous sulfate) was used to form ettringite as a main hydration product of aluminate cement. Then, the influence of the proportion of ferrous sulfate in sulfate on the setting time, compressive strength and volume stability of aluminate cement paste was studied. The type and microstructure of the hydration products were also analyzed by XRD and SEM to reveal the influence mechanism of ferrous sulfate on properties of cement paste. The results show that appropriate amount of sulfate can improve the compressive strength of aluminate cement paste. Ferrous sulfate has a slight promoting effect on the setting time and a significant inhibiting effect on the expansion rate of aluminate cement. Ferrous sulfate inhibits the formation of ettringite, and an appropriate amount of ferrous sulfate makes the generated ettringite with smaller size and uniform distribution, which is conducive to improving the compressive strength of the hardened paste.

Key words: aluminate cement, sulfate, ferrous sulfate, ettringite, compressive strength, expansibility

中图分类号:

TQ172

张梦真, 娄广辉, 刘子娴, 蔡基伟, 许鸽龙, 乔一佳, 张祥飞. 硫酸亚铁对铝酸盐水泥浆体性能及水化产物的影响[J]. 硅酸盐通报, 2024, 43(3): 844-850.

ZHANG Mengzhen, LOU Guanghui, LIU Zixian, CAI Jiwei, XU Gelong, QIAO Yijia, ZHANG Xiangfei. Effect of Ferrous Sulfate on Properties and Hydration Products of Aluminate Cement Paste[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(3): 844-850.

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硫酸亚铁对铝酸盐水泥浆体性能及水化产物的影响

Effect of Ferrous Sulfate on Properties and Hydration Products of Aluminate Cement Paste

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