矿渣微粉对水泥净浆性能及氯离子固化作用的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (9): 3240-3247.

矿渣微粉对水泥净浆性能及氯离子固化作用的影响

张涛¹, 王腾¹, 张琰², 谭洪波³, 刘佳龙², 董超²

1.国网山东省电力公司,潍坊供电公司,潍坊 261000;
2.中国电力科学研究院有限公司,北京 100192;
3.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:2023-05-17 修订日期:2023-06-26 出版日期:2023-09-15 发布日期:2023-09-14
通信作者: 张琰,博士,正高级工程师。E-mail:zhangyan3@epri.sgcc.com.cn
作者简介:张涛(1975—),男,高级工程师。主要从事输变电工程设计和施工技术方面的研究。E-mail:wfgdgsjjb@163.com
基金资助:
国网山东省电力公司潍坊供电公司科技项目

Effect of GGBS on Properties and Chloride Binding of Cement Paste

ZHANG Tao¹, WANG Teng¹, ZHANG Yan², TAN Hongbo³, LIU Jialong², DONG Chao²

1. Weifang Power Supply Company, State Grid Shandong Electric Powder Company, Weifang 261000, China;
2. China Electric Power Research Institute Co., Ltd., Beijing 100192, China;
3. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2023-05-17 Revised:2023-06-26 Online:2023-09-15 Published:2023-09-14

摘要/Abstract

摘要： 为解决钢筋混凝土氯离子侵蚀难题,研究了不同掺量矿渣微粉对水泥净浆工作性能、力学性能和氯离子固化性能的影响,并通过物相分析、热重分析、孔结构分布和热力学模拟等方法对氯离子固化机理进行表征分析。结果表明:矿渣微粉能够改善水泥基材料的工作性能,有效提升水泥净浆后期抗压强度和氯离子固化能力,掺量为30%(质量分数)时综合性能最佳;矿渣微粉能够化学结合氯离子,促进体系生成Friedel盐和Kuzel盐,并且能够发生火山灰效应提升C-S-H凝胶含量,细化硬化浆体孔隙结构,提升密实度;水泥净浆氯离子固化能力受氯离子化学结合、物理吸附和阻迁能力共同作用,随着矿渣微粉掺量增加,水泥净浆氯离子化学结合和物理吸附能力逐渐增强,而阻迁能力存在最优掺量。本研究为矿渣微粉水泥基材料在远海岛礁工程建设中的应用提供技术支持和理论支撑。

关键词: 矿渣微粉, 水泥净浆, 氯离子固化, 物相组成, 孔结构, 热力学模拟

Abstract: In order to solve the problem of chloride erosion in reinforced concrete, the effects of different dosages of ground granulated blast furance slag(GGBS)on working performance, mechanical properties and chloride binding capacity of cement paste were studied, and the chloride binding mechanism was characterized and analyzed by phase composition, thermogravimetric analysis, pore structure distribution and thermodynamic simulation. The results show that the GGBS can improve the working performance of cement-based materials, and effectively improve the compressive strength and chloride binding capacity of cement paste at the later stage. The comprehensive performance is the best when the GGBS content is 30% (mass fraction). The GGBS can chemically combine with chloride ions to promote the formation of Friedel's salt and Kuzel's salt, and the pozzolanic effect can increase the content of C-S-H and refine the pore structure of hardened slurry to improve the compactness. The chloride binding capacity of the cement paste with GGBS is affected by the chemical binding, physical adsorption and migration resistance of chloride ions. With the increase of the content of GGBS, the chloride chemical binding and physical adsorption ability of the cement paste gradually increase, and there is an optimal content of GGBS for migration resistance. This study provides technical and theoretical support for using GGBS cement based materials in offshore islands.

Key words: GGBS, cement paste, chloride binding, phase composition, pore structure, thermodynamic simulation

中图分类号:

TU528

张涛, 王腾, 张琰, 谭洪波, 刘佳龙, 董超. 矿渣微粉对水泥净浆性能及氯离子固化作用的影响[J]. 硅酸盐通报, 2023, 42(9): 3240-3247.

ZHANG Tao, WANG Teng, ZHANG Yan, TAN Hongbo, LIU Jialong, DONG Chao. Effect of GGBS on Properties and Chloride Binding of Cement Paste[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(9): 3240-3247.

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