非规则再生骨料建模方法及其对混凝土抗压性能的影响

doi:10.11896/cldb.24100247

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Abstract To account for the shape of recycled aggregates (RAs) and to thoroughly investigate the influence of key RA parameters on the compressive performance of recycled aggregate concrete (RAC), thiswork aims to promote the high-value utilization of RAs. A Shape Overlay Method and a corresponding random placement algorithm was proposed to achieve parametric modeling of RAC mesostructures incorporating RAs with realistic shapes. Based on the "mapped mesh method" and a cohesive zone model, a numerical model for RAC was established and calibrated by existing experimental data. The effects of key parameters, such as RA replacement ratio, residual mortar content, new-to-old mortar strength ratio, and porosity, on the mechanical response and fracture process of RAC under compressive loading were investigated. The results indicate that, without considering the additional reduction in water-cement ratio due to the high-water absorption of RAs, the compressive strength of RAC decreases as the increase of RA replacement ratio, new-to-old mortar strength ratio, residual mortar content, and porosity with a maxium reduction of up to 15%—20%. This is mainly attributed to the role of the old interface of RAs and initial voids in guiding crack propagation.

Key words： recycled aggregate recycled aggregate concrete compressive properties cohesion finite element analysis

Published: Online: 2025-10-27

CLC number:

TU521.1

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	Articles by authors
	FU Yu
	GAO Peng
	ZHAN Binggen
	LI Jingzhe
	HU Yanbo
	YU Qijun

Cite this article:

FU Yu,GAO Peng,ZHAN Binggen, et al. The Modeling Methods of Irregular Recycled Aggregates and Their Impact on the Compressive Strength of Concrete[J]. Materials Reports, 2025, 39(20): 24100247-9.

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https://www.mater-rep.com/EN/10.11896/cldb.24100247 OR https://www.mater-rep.com/EN/Y2025/V39/I20/24100247

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