化学驱动与热力学驱动下复合胶凝体系的水化特性研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (5): 1462-1469.

所属专题：水泥混凝土

化学驱动与热力学驱动下复合胶凝体系的水化特性研究

张秀贞^1,2, 刘志超^1,2, 何永佳^1,2, 胡曙光^1,2, 曾波³

1.武汉理工大学,硅酸盐建筑材料国家重点实验室,武汉 430070;
2.武汉理工大学材料科学与工程学院,武汉 430070;
3.北京都市绿源环保科技有限公司,北京 102601

收稿日期:2021-03-26 修回日期:2021-04-26 出版日期:2021-05-15 发布日期:2021-06-07
通讯作者: 刘志超,教授。E-mail:liuzc9@whut.edu.cn
作者简介:张秀贞(1994—),女,博士研究生。主要从事多元胶凝材料的水化热动力研究。E-mail:xiuzhenz@whut.edu.cn
基金资助:
国家重点研发计划(2017YFB0310000);国家自然科学基金(51872216);高性能土木工程材料国家重点实验室开放基金(2019CEM005)

Hydration Characteristics of Composite Cementitious System Driven by Chemistry and Thermodynamics

ZHANG Xiuzhen^1,2, LIU Zhichao^1,2, HE Yongjia^1,2, HU Shuguang^1,2, ZENG Bo³

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;
3. Beijing Urban Lvyuan Environmental Protection Technology Co., Ltd., Beijing 102601, China

Received:2021-03-26 Revised:2021-04-26 Online:2021-05-15 Published:2021-06-07

摘要/Abstract

摘要： 为了解复合胶凝材料体系水化放热特性,以及化学驱动与热力学驱动对复合胶凝材料体系的水化放热影响,研究了不同掺量的粉煤灰/矿粉-水泥二元复合胶凝体系的水化热发展,同时探究了不同早强剂掺量以及不同温度对粉煤灰-水泥二元复合胶凝体系水化放热的影响。结果表明:粉煤灰、矿粉均会降低二元复合胶凝体系水化放热速率,但矿粉活性比粉煤灰高,对水化放热速率以及最终累计放热量影响较小;化学驱动可以显著提高体系水化放热速率,促进早期水化发展,但不改变最终累计放热量;热力学驱动作用效果更显著,可以大幅提高体系放热曲率以及累计放热量。以化学反应速率为判据构建两种驱动的联系能有效地设计混合驱动模式。

关键词: 复合胶凝体系, 水化热, 化学驱动, 热力学驱动, 化学反应速率

Abstract: In order to understand the hydration heat release characteristics of the composite cementitious material system, and the influence of chemical and thermodynamic driving on the hydration heat release of the composite cementitious material system, the development ofhydration heat of the binary composite cementitious system of fly ash- or slag-cement with different content was studied. At the same time, the influence of different harden accelerator content and different temperatures on the hydration heat release of the fly ash-cement binary composite cementitious system was explored. The results show that both fly ash and slag can reduce the hydration heat release rate of the binary composite cementitious system, but the activity of slag is higher than that of fly ash, which has little effect on the hydration heat release rate and the final cumulative heat release. Chemical driving can significantly increase the rate of hydration heat release of the system and promote the development of early hydration, but it does not change the final cumulative heat release. The thermodynamic driving effect is more significant, which greatly increases the heat release curvature of the system and the cumulative heat release. Using the chemical reaction rate as the criterion to establish a connection between the two driving forces can effectively design the hybrid driving mode.

Key words: composite cementitious system, hydration heat, chemical drive, thermodynamic drive, chemical reaction rate

中图分类号:

TB333

张秀贞, 刘志超, 何永佳, 胡曙光, 曾波. 化学驱动与热力学驱动下复合胶凝体系的水化特性研究[J]. 硅酸盐通报, 2021, 40(5): 1462-1469.

ZHANG Xiuzhen, LIU Zhichao, HE Yongjia, HU Shuguang, ZENG Bo. Hydration Characteristics of Composite Cementitious System Driven by Chemistry and Thermodynamics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1462-1469.

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化学驱动与热力学驱动下复合胶凝体系的水化特性研究

Hydration Characteristics of Composite Cementitious System Driven by Chemistry and Thermodynamics

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