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硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (7): 2288-2295.

• 资源综合利用 • 上一篇    下一篇

普通硅酸盐水泥改性脱硫建筑石膏耐水性能

郭会师1, 王庆佩1, 张果1, 李文凤2, 孟二超1, 陈文亮1, 惠守华1, 周立明1   

  1. 1.郑州轻工业大学材料与化学工程学院,郑州 450001;
    2.河南工业大学材料科学与工程学院,郑州 450001
  • 收稿日期:2021-01-31 修回日期:2021-04-09 出版日期:2021-07-15 发布日期:2021-08-04
  • 通讯作者: 周立明,博士,教授。E-mail:zlming1212@126.com
  • 作者简介:郭会师(1984—),男,博士。主要从事新型绿色无机材料方面研究。E-mail:guohuishi@zzuli.edu.cn
  • 基金资助:
    国家自然科学基金(51802290,21671178);河南省重点科技攻关项目(182102210613,172102210223);郑州轻工业大学博士科研基金(2017BSJJ041)

Water Resistance of Flue Gas Desulfurization Building Gypsum Modified by Ordinary Portland Cement

GUO Huishi1, WANG Qingpei1, ZHANG Guo1, LI Wenfeng2, MENG Erchao1, CHEN Wenliang1, HUI Shouhua1, ZHOU Liming1   

  1. 1. College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001,China;
    2. College of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
  • Received:2021-01-31 Revised:2021-04-09 Online:2021-07-15 Published:2021-08-04

摘要: 石膏的耐水性能差限制了其在建筑领域的应用,本文以郑州地区脱硫建筑石膏为主要原料,普通硅酸盐水泥为辅料制备了耐水性能好且成本较低的改性脱硫建筑石膏,系统研究了水泥用量对样品水化后的物理性能、物相组成和显微结构的影响。结果表明,随着水泥掺量的增加,其水化后生成的钙钒石(AFt)、氢氧化钙(CH)和水化硅酸钙(C-S-H)凝胶逐渐增多并填充气孔,使样品水化后的吸水率呈先降低后升高的趋势,而软化系数、接触角和硬度则呈相反的趋势,当水泥的用量为18%(质量分数)时,样品耐水性能较佳。本研究为制备耐水性能好且经济环保的脱硫建筑石膏及其制品提供了技术依据,并对脱硫石膏的推广应用及建材行业的绿色发展具有重要意义。

关键词: 脱硫建筑石膏, 硅酸盐水泥, 耐水性能, 接触角

Abstract: The gypsum has been limited in building field due to its poor water resistance. The modified flue gas desulfurization (FGD) building gypsum with well water resistance and low cost was fabricated with the FGD building gypsum and ordinary Portland cement as raw materials in this paper. The effect of cement content on physical properties, phase composition, and microstructure of hydrated samples was systematically investigated. Results show that with the increase of the ordinary Portland cement content, the content of AFt, CH, and C-S-H increases, which fill the pores, so that the water absorption decreases first and then increases, while the softening coefficient, contact angle, and hardness show an opposite trend. When the content of cement is 18% (mass fraction), the hydrated sample shows a well water resistance. This study provides a technical basis for the preparation of the FGD building gypsum and its products with well water resistance, low-cost, and environment-friendly, which also has an important significance to the popularization and application of the FGD gypsum.

Key words: flue gas desulfurization building gypsum, ordinary Portland cement, water resistance, contact angle

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