无水硫铝酸钙-石膏-石灰石水化体系的热力学模拟与验证

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (6): 1861-1868.

所属专题：水泥混凝土

无水硫铝酸钙-石膏-石灰石水化体系的热力学模拟与验证

黄维峰¹, 廖宜顺^1,2, 左义兵³

1.武汉科技大学城市建设学院,武汉 430065;
2.武汉科技大学高性能工程结构研究院,武汉 430065;
3.华中科技大学土木与水利工程学院,武汉 430074

收稿日期:2022-01-12 修订日期:2022-03-31 出版日期:2022-06-15 发布日期:2022-07-01
通信作者: 廖宜顺,博士,副教授。E-mail:liaoyishun@wust.edu.cn
作者简介:黄维峰(1997—),男,硕士研究生。主要从事高性能土木工程材料研究。E-mail:2271609352@qq.com
基金资助:
长江科学院开放研究基金(CKWV2019756/KY);国家自然科学基金(51608402);中央高校基本科研业务费专项资金资助(HUST:2020kfyXJJS038)

Thermodynamic Modelling and Verification of Ye'elimite-Anhydrite-Limestone Hydration System

HUANG Weifeng¹, LIAO Yishun^1,2, ZUO Yibing³

1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China;
2. Institute of High Performance Engineering Structure, Wuhan University of Science and Technology, Wuhan 430065, China;
3. School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Received:2022-01-12 Revised:2022-03-31 Online:2022-06-15 Published:2022-07-01

摘要/Abstract

摘要： 基于热力学模拟,研究了无水硫铝酸钙-石膏-石灰石三元体系的水化产物组成和含量变化规律。模拟结果表明,在无水硫铝酸钙-石膏-石灰石三元体系中,根据石膏、石灰石的掺量和液相的pH值变化,可将水化产物相和pH值的演变过程分为5个区域(Ⅰ~Ⅴ区)。Ⅱ区与Ⅲ、Ⅳ区的边界为石灰石完全反应的边界,Ⅳ区与Ⅴ区的边界为石膏完全反应的边界。基于模拟结果建立了无水硫铝酸钙-石膏-石灰石三元体系的水化模型,并结合实验数据进行了验证,该研究结果为无水硫铝酸钙-石膏-石灰石三元体系的水化机理研究以及硫铝酸盐水泥的配料设计提供了重要理论依据。

关键词: 热力学模拟, 无水硫铝酸钙, 石膏, 石灰石, 水化产物组成, pH值

Abstract: The hydrate phase assemblage and content evolutions of ye'elimite-anhydrite-limestone ternary system were studied based on the thermodynamic modelling. The results show that the evolutions of hydrate phase and pH value can be divided into 5 regions (region Ⅰ~Ⅴ) according to the content of anhydrite and limestone, and the change of pH value of the liquid phase in ye'elimite-anhydrite-limestone ternary system. The boundaries between region Ⅱ and region Ⅲ, Ⅳ are exactly the fully-reaction boundary of limestone. The boundary between region Ⅳ and region Ⅴ is exactly the fully-reaction boundary of anhydrite. The hydration model of ye'elimite-anhydrite-limestone ternary system is established based on the thermodynamic modelling and verified by experimental data. The research results provide an important theoretical basis for the study of the hydration mechanism of ye'elimite-anhydrite-limestone ternary system and the batching design of sulfoaluminate cement.

Key words: thermodynamic modelling, ye'elimite, anhydrite, limestone, hydrate phase assemblage, pH value

中图分类号:

TQ172.11

黄维峰, 廖宜顺, 左义兵. 无水硫铝酸钙-石膏-石灰石水化体系的热力学模拟与验证[J]. 硅酸盐通报, 2022, 41(6): 1861-1868.

HUANG Weifeng, LIAO Yishun, ZUO Yibing. Thermodynamic Modelling and Verification of Ye'elimite-Anhydrite-Limestone Hydration System[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 1861-1868.

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无水硫铝酸钙-石膏-石灰石水化体系的热力学模拟与验证

Thermodynamic Modelling and Verification of Ye'elimite-Anhydrite-Limestone Hydration System

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