基于逾渗理论的实海环境再生混凝土抗Cl<sup>-</sup>渗透特性研究

doi:10.11896/cldb.24100208

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Abstract To investigate the evolution of pore structure characteristics and ion transport mechanisms of recycled aggregate concrete (RAC) subjected to real marine exposure environments, based on percolation theory, backscattered electron imaging (BSE) and other microstructural testing techniques, along with Image J software for pore extraction and classification, were utilized in conjunction with macroscopic performance analysis. The impact of chloride ion penetration on the development and evolution of internal pores and cracks in RAC under marine exposure was syste-matically explored, and then a relationship between chloride ion permeability and percolation parameters was established. The effects of recycled concrete type and marine exposure age on the two-dimensional percolation characteristics were also examined. The results reveal a strong correlation between the macroscopic performance of RAC and percolation parameters such as percolation probability, maximum cluster size, and saturation degree. These percolation parameters can effectively characterize the chloride ion erosion mechanism in RAC under marine conditions. The appropriate addition of fly ash and metakaolin significantly enhances both the compressive strength and chloride ion resistance of RAC. The optimal amount of fly ash and metakaolin is 20% and 10%, respectively.

Key words： recycled concrete fly ash metakaolin real marine exposure percolation parameter 2D percolation

Published: 10 December 2025 Online: 2025-12-03

CLC number:

TU528

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	Articles by authors
	ZHU Yuanlang
	ZHANG Hengwu
	LYU Kaiyue
	YANG Shanxu
	ZHANG Shiyu
	WANG Shiyinuo
	XIE Bojun
	GAO Song

Cite this article:

ZHU Yuanlang,ZHANG Hengwu,LYU Kaiyue, et al. Study on the Chloride Ion Permeability Characteristics of Recycled Concrete in Real Marine Environments Based on Percolation Theory[J]. Materials Reports, 2025, 39(23): 24100208-8.

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https://www.mater-rep.com/EN/10.11896/cldb.24100208 OR https://www.mater-rep.com/EN/Y2025/V39/I23/24100208

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