Numerical Simulation and Experimental Validation of the Resistance of Recycled Aggregate Concrete to Chloride Penetration Under Freeze-Thaw Cycles.

Yuze Li, Jiayi Zhao, Qifeng Liu, Xiaoyang Chen, Haiwei Zhang, Kairong Jin, Wei Wang, Peng Yin, Tingting Zhang

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Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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9 authors.

Yuze LiSchool of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China.

Jiayi ZhaoSchool of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China.

Qifeng LiuSchool of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China.

Xiaoyang ChenSchool of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China.

Haiwei ZhangSchool of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China.

Kairong JinState Key Laboratory of Water Engineering Ecology and Environment in Arid Area, Inner Mongolia Agricultural University, Hohhot 010018, China.

Wei WangNingxia Construction Project Quality and Safety General Station, Yinchuan 750021, China.

Peng YinSchool of Civil Engineering, Dalian University of Technology, Dalian 116024, China.ORCID 0009-0005-0731-8673

Tingting ZhangSchool of Civil Engineering, Dalian University of Technology, Dalian 116024, China.

Funding

National Natural Science Foundation of China 52500161Science and Technology Innovation Support Program of Dalian 2025RG02

6 · The paper itself

Abstract

This study investigated the resistance of recycled aggregate concrete (RAC) to chloride penetration under freeze-thaw cycles using both numerical simulation and experimental validation. A five-phase mesoscale model of RAC was developed. The salt freeze-thaw test was conducted to validate the simulated values and explore the effects of different recycled coarse aggregate (RCA) substitution ratios, as well as varying dosages of fly ash and superfine fly ash, on chloride concentration in RAC. The experimental data showed satisfactory agreement with the simulated values, confirming the model's validity. Additionally, the RCA volume fraction, interfacial transition zone (ITZ) thickness, and adhesive ratio of old mortar were analyzed using simulation. The variation patterns of compressive strength, relative dynamic elastic modulus, and mass loss of RAC also revealed the mechanisms by which RCA substitution ratio and the dosages of fly ash and superfine fly ash act under salt freeze-thaw conditions. This study provides guidance for enhancing the resistance of RAC to chloride penetration and its durability under freeze-thaw conditions.

Indexed as

chloride penetrationexperimental validationfreeze-thaw cyclesnumerical simulationrecycled aggregate concrete

Identifiers

PMID42590418

DOI10.3390/ma19153342

PMCPMC13468107

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