实海暴露环境再生混凝土三维逾渗特性研究

doi:10.16552/j.cnki.issn1001-1625.2024.0897

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (1): 274-288.DOI: 10.16552/j.cnki.issn1001-1625.2024.0897

实海暴露环境再生混凝土三维逾渗特性研究

朱元浪¹, 张明亮², 魏京华³, 张恒武², 刘子盼⁴, 高嵩¹

1.青岛理工大学土木工程学院,青岛 266011;
2.山东和兴建筑安装工程有限公司,滨州 256600;
3.平度市城乡建设局,青岛 266011;
4.核建青控(山东)项目管理有限公司,青岛 266011

收稿日期:2024-07-30 修订日期:2024-09-03 出版日期:2025-01-15 发布日期:2025-01-23
通信作者: 高嵩,教授。E-mail:Gaosong727@126.com
作者简介:朱元浪(2002—),男,硕士研究生。主要从事建筑固废的研究。E-mail:yuanlangzhu@163.com
基金资助:
国家自然科学基金委员会-山东省人民政府联合基金(U2006233)

3D Percolation Performance of Recycled Aggregate Concrete in Real Marine Exposure Environments

ZHU Yuanlang¹, ZHANG Mingliang², WEI Jinghua³, ZHANG Hengwu², LIU Zipan⁴, GAO Song¹

1. College of Civil Engineering, Qingdao University of Technology, Qingdao 266011, China;
2. Shandong Hexing Construction and Installation Engineering Co., Ltd., Binzhou 256600, China;
3. Bureau of Urban-Rural Development of Pingdu, Qingdao 266011, China;
4. Hejian Qingkong (Shandong) Project Management Co., Ltd., Qingdao 266011, China

Received:2024-07-30 Revised:2024-09-03 Published:2025-01-15 Online:2025-01-23

摘要/Abstract

摘要： 为研究实海暴露环境下再生混凝土(RAC)孔隙结构特性的动态演化过程,基于逾渗理论,通过计算机断层扫描(X-CT)等微观测试方法,结合宏观性能分析,研究了掺粉煤灰和偏高岭土的RAC在实海暴露环境下的孔隙分布特征及氯离子侵蚀情况,深入探讨了实海暴露环境下氯离子侵蚀对RAC内部孔隙和裂隙发展及演变的影响,并分析了不同类型再生混凝土及不同实海暴露龄期下各体系的逾渗特性。研究结果表明,适量掺加粉煤灰和偏高岭土可显著提高再生混凝土的抗压强度和抗氯离子侵蚀能力。分形维数与RAC体系的宏观性能及逾渗参数存在一定的相关性,逾渗理论能够预测氯盐迁移行为并揭示侵蚀机理。本研究对深入理解RAC中离子传输机制及RAC耐久性问题的研究具有重要意义。

关键词: 再生混凝土, 偏高岭土, 粉煤灰, 实海暴露, 逾渗理论, 三维逾渗

Abstract: To elucidate the dynamic evolution of pore structure characteristics in recycled aggregate concrete (RAC) under real marine exposure environments, this study integrated percolation theory with advanced micro-testing techniques, including X-ray computed tomography (X-CT), alongside macro-performance analyses. The investigation focused on the pore distribution and chloride ion corrosion in RAC modified with fly ash (FA) and metakaolin (MK) subjected to real marine exposure. The study provided a comprehensive assessment of the effect of chloride ion corrosion on the progression and development of internal pores and cracks within RAC, and examined the percolation performance across various RAC formulations and real marine exposure ages. Findings reveal that the strategic incorporation of FA and MK significantly improves RAC compressive strength and resistance to chloride ion corrosion. A discernible correlation between fractal dimension and both macro-performance and percolation parameters is established. Percolation theory effectively predicts chloride salt migration and elucidates the underlying erosion mechanisms. This research offers critical insights into ion transport mechanisms in concrete and enhances the understanding of RAC durability.

Key words: recycled aggregate concrete, metakaolin, fly ash, real marine exposure, percolation theory, three-dimensional percolation

中图分类号:

TU528

朱元浪, 张明亮, 魏京华, 张恒武, 刘子盼, 高嵩. 实海暴露环境再生混凝土三维逾渗特性研究[J]. 硅酸盐通报, 2025, 44(1): 274-288.

ZHU Yuanlang, ZHANG Mingliang, WEI Jinghua, ZHANG Hengwu, LIU Zipan, GAO Song. 3D Percolation Performance of Recycled Aggregate Concrete in Real Marine Exposure Environments[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(1): 274-288.

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实海暴露环境再生混凝土三维逾渗特性研究

3D Percolation Performance of Recycled Aggregate Concrete in Real Marine Exposure Environments

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