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Structural Engineering and Mechanics Volume 89, Number 1, January10 2024 , pages 47-59 DOI: https://doi.org/10.12989/sem.2024.89.1.047 |
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Experimental and numerical investigation of fiber-reinforced slag-based geopolymer precast tunnel lining segment |
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Arass Omer Mawlod and Dillshad Khidhir Hamad Amen Bzeni
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| Abstract | ||
| In this study, a new sustainable material was proposed to prepare precast tunnel lining segments (TLS), which were produced using a fiber-reinforced slag-based geopolymer composite. Slag was used as the geopolymer binder. In addition, polypropylene and carbon fibers were added to reinforce TLSs. TLSs were examined in terms of flexural performance, loaddeflection response, ductility, toughness, crack characteristics, and tunnel boring machine (TBM) thrust force. Simultaneously, numerical simulation was performed using finite element analysis. The mechanical characteristics of the geopolymer composite with a fiber content of 1% were used. The results demonstrated that the flexural performance and load-deflection response of the precast TLSs were satisfactory. Furthermore, the numerical results were capable of predicting and realistically capturing the structural behavior of precast TLSs. Therefore, fiber-reinforced slag-based geopolymer composites can be applied as precast TLSs. | ||
| Key Words | ||
| GID software; finite element analysis; three-point flexural strength; toughness; tunnel lining segment | ||
| Address | ||
| Arass Omer Mawlod: Civil Engineering Department, University of Raparin, Kurdistan Region, Iraq Dillshad Khidhir Hamad Amen Bzeni: Civil Engineering Department, Salahadin University-Erbil, Kurdistan Region, Iraq | ||