Experimental Study on Interfacial Bond Performance and Influencing Factors of Waste Copper Tailings Recycled Concrete and Steel Bars
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Abstract
To mitigate environmental issues associated with waste copper tailings and overcome the interfacial bonding limitations of recycled concrete, this study investigates the bond performance between waste copper tailings recycled concrete and steel bars while considering the reinforcing effect of industrial textile fibers. The incorporation of textile fibers enhances the integrity of the composite matrix and provides a sustainable strategy for high-value utilization of industrial solid waste. Experimental results indicate that the optimal interfacial bond performance is achieved at a copper tailings content of 20%, whereas a recycled aggregate replacement rate above 50% leads to a significant reduction in bond strength. HRB400 ribbed steel bars exhibit superior bonding behavior compared with smooth steel bars, and standard curing conditions are more favorable for interfacial strength development. Microscopic analyses reveal that the filling effect of copper tailings reduces the interfacial transition zone thickness from 35 µm to 22 µm and decreases porosity to 17.1%, thereby improving the compactness of the interface. The study identifies the key influencing factors and optimal parameter combinations governing the bond behavior of waste copper tailings recycled concrete and steel bars, providing theoretical support for resource-efficient construction materials and offering useful references for multifunctional composite structures, including electromagnetic shielding concrete and infrastructure materials requiring enhanced structural reliability.
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References
N. Lv, X. Li, X. L. Liang, X. Yuan, G. X. Fang, and B. Song, “Analysis of physical and mechanical properties of 3D printed copper tailings sand concrete,” Metal Mine, no. 10, pp. 253-258, 2023, doi: 10.19614/j.cnki.jsks.202310035.
M. F. Gou, L. F. Zhou, and N. W. Y. Then, “Utilization of tailings in cement and concrete: A review,” Science and Engineering of Composite Materials, vol. 26, no. 1, pp. 449-464, 2019, doi: 10.1515/secm-2019-0029.
H. Q. Zhang, Q. Y. Li, J. Wen, H. Y. Shen, Z. Wang, B. L. Yu, et al., “Utilization status and prospect of copper tailings resources,” Modern Mining Industry, vol. 33, no. 01, pp. 127-131, 2017, doi: 10.3969/j.issn.1674-6082.2017.01.031.
Y. G. Zhao, Y. Chen, and C. L. Wang, “Research progress on the application of tailings sand in concrete,” New Building Material, vol. 52, no. 09, pp. 127-130, 2025.
D. Y. Ji, W. T. Xu, and Z. Q. Xie, “Research progress and application prospect of recycled concrete,” Journal of Puyang Vocational and Technical College, vol. 38, no. 06, pp. 9-13, 2025.
Z. X. Wu, B. Chen, M. Y. Li, Z. F. Pan, Y. Fang, and X. Y. Ye, “Direct shear test and numerical simulation of recycled concrete-ordinary concrete interface,” Structural Engineers, vol. 41, no. 05, pp. 195-204, 2025, doi: 10.15935/j.cnki.jggcs.202505.0022.
W. Ma, L. Yan, and B. Kasal, “Bond and tensile properties of flax textile reinforced recycled aggregate concrete: Strategies for interfacial enhancement and corresponding mechanisms,” Case Studies in Construction Materials, vol. 21, Art. no. e04006, 2024, doi: 10.1016/j.cscm.2024.e04006.
Q. Q. Hao, M. Y. Luo, Y. H. Zhao, and B. W. Xiao, “Influence of aggregate particle size and water-cement ratio on the interfacial transition zone of recycled concrete,” Journal of Lanzhou Institute of Technology, vol. 32, no. 05, pp. 101-106, 2025.
D. F. Wang, M. Y. Zhu, Y. P. Luo, et al., “Research on mix ratio design of copper tailings geopolymer concrete,” Construction Technology (Chinese and English), vol. 51, no. 14, pp. 105-109+119, 2022, doi: 10.7672/sgjs2022140105.
D. Darwin and A. B. Matamoros, “Bond and development of straight reinforcing bars in tension,” ACI 408R-03), American Concrete Institute, Farmington Hills, Mich, p. 48, 2003.
H. W. Li, “Research on the failure mechanism of reinforced concrete under cyclic loading[D],” Chongqing Jiaotong University, 2023, doi: 10.27671/d.cnki.gcjtc.2023.001336.
H. Jalilifar and F. Sajedi, “Micro-structural analysis of recycled concretes made with recycled coarse concrete aggregates,” Construction and Building Materials, vol. 267, Art. no. 121041, 2021, doi: 10.1016/j.conbuildmat.2020.121041.
L. J. Ouyang, Z. W. An, W. T. Yang, B. Ding, and B. Zen, “Research progress on the micro-characteristics of concrete interfacial transition zone (ITZ),” Concrete and Cement Products, no. 02, pp. 7-12, 2018, doi: 10.19761/j.1000-4637.2018.02.002.
H. Z. Wu, J. Z. Peng, Y. X. Pan, G. Yu, S. F. Zen, and H. J. Xu, “Research progress of copper tailings in cement production and concrete application,” Bulletin of the Chinese Ceramic Society, vol. 44, no. 06, pp. 2172-2180+2192, 2025, doi: 10.16552/j.cnki.issn1001-1625.2024.1349.
China Architecture and Building Press – GB/T 25177-2010 – Recycled Coarse Aggregates for Concrete, 2010.
China Planning Press – GB/T 50367-2013 – Code for Design of Strengthening Concrete Structures, 2013.
Ministry of Housing and Urban-Rural Development of the People’s Republic of China and State Administration for Market Regulation – GB/T 50081-2019 – Standard for Test Methods of Physical and Mechanical Properties of Concrete, Beijing: China Architecture and Building Press, 2019.