Behavior of manufactured sand and recycled coarse aggregate concrete-filled steel tubular stub columns with circular section

Minsheng Guan; Qi Chen; Gang Wang; Aiguo Xiong; Ying Wang; Le Li; Anne W. M. Ng; Qing Quan Liang

doi:10.1002/suco.70639

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Behavior of manufactured sand and recycled coarse aggregate concrete-filled steel tubular stub columns with circular section

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Behavior of manufactured sand and recycled coarse aggregate concrete-filled steel tubular stub columns with circular section

Minsheng Guan, Qi Chen, Gang Wang, Aiguo Xiong, Ying Wang, Le Li, Anne W. M. Ng and Qing Quan Liang

Structural Concrete, Vol.Advanced access

14-May-2026

DOI: https://doi.org/10.1002/suco.70639

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Abstract

concrete-filled steel tubes

manufactured sand

recycled course aggregate

ultimate strength

Accelerated urbanization has intensified environmental concerns due to excessive natural resource consumption and construction waste generation. Circular concrete-filled steel tube (CFST) columns incorporating manufactured sand recycled coarse aggregate (MS-RCA) concrete have emerged as an innovative composite element offering notable environmental and economic benefits. To advance the use of MS-RCA concrete in CFST structures, this paper presents experimental investigations into the behavior of 72 circular CFST stub columns constructed with MS-RCA concrete. The effects of aggregate type, steel tube thickness, and stone powder content on structural response are examined. The results show that the failure modes of CFST columns with MS-RCA concrete are characterized by local buckling and shear failure, similar to those of circular CFST columns with natural aggregate concrete. CFST columns with MS-RCA have about 5.6% higher ultimate axial strength than those filled with natural sand-RCA concrete. The inclusion of MS significantly enhances the ductility of CFST columns by an average of 34.6%, 25.4%, and 28.6% for steel tube thicknesses of 3.0, 3.5, and 4.0 mm, respectively. Moreover, for high-strength concrete, the ultimate strength of columns filled with pebble MS-RCA concrete is higher than that of those filled with limestone MS-RCA concrete. Existing codes for CFST columns are evaluated and found to be highly conservative. Therefore, a new formula is proposed for CFST columns filled with MS-RCA concrete and validated by experimental data. These findings confirm the viability of CFST columns with MS-RCA concrete and highlight their potential to advance sustainable civil infrastructure.

Details

Title: Behavior of manufactured sand and recycled coarse aggregate concrete-filled steel tubular stub columns with circular section
Authors: Minsheng Guan - Shenzhen University
Qi Chen - Shenzhen University
Gang Wang - Shenzhen University
Aiguo Xiong - China Construction Fourth Engineering Division Corp., Ltd. (China)
Ying Wang - Fuzhou University
Le Li - Victoria University
Anne W. M. Ng - University of the Sunshine Coast
Qing Quan Liang (Corresponding Author) - Victoria University
Publication details: Structural Concrete, Vol.Advanced access
Publisher: John Wiley & Sons Ltd.
DOI: 10.1002/suco.70639
ISSN: 1751-7648
Copyright note: © 2026 The Author(s). Structural Concrete published by John Wiley & Sons Ltd on behalf of International Federation for Structural Concrete. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Data Availability: The data that support the findings of this study are available from the corresponding author upon reasonable request.
Grant note: This work was supported by the National Natural Science Foundation of China (Grant No. 52278195 and 52578222).
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 991239299002621
Output Type: Journal article

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