A comparative study on mechanical and environmental performance of concrete-filled steel tubes using molybdenum tailing aggregate. (February 2022) - Gao, Shan
Abstract: Aiming at utilizing molybdenum tailing (MoT) in structural concrete members, the mechanical and environmental performance of molybdenum tailing concrete filled steel tubes (MoTCFST) were experimentally studied and compared with those of reinforced molybdenum tailing concrete (RMoTC) counterparts. The results show that the strength reduction and dispersion for MoTCFST under various MoT replacement ratio are both less than those for RMoTC which reveals that concrete-filled tube is a promising structural concrete member in the utilization of molybdenum tailing. By considering MoT replacement ratio, the strength prediction methods for MoTCFST and RMoTC are proposed to conduct the full-range mechanical performance analysis. To achieve the same axial strength, using MoTCFST would show much less environmental impact than RMoTC. A ratio between the axial strength and environmental impact weighting value of molybdenum tailing concrete (MoTC) products is proposed to assess their mechanical-environmental performance efficiency. High-strength materials are beneficial to both the mechanical and environmental performance of MoTC products whilst increasing sectional steel ratio would remarkably reduce the mechanical-environmental performance efficiency of them. Highlights: Total 32 circular stubs including MoTCFST and RMoTC were tested axially. The configuration of concrete-filled tube is preferable in the application of MoTC. Using MoTCFST shows much less environmental impact than RMoTC. The mechanical-environmental performance efficiency of MoT products is assessed.