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This paper presents the results of an investigation into geopolymer concrete confined by hoop reinforcement. The investigation focused on the strength and ductility of confined geopolymer concrete subjected to axial loads. The main objective of this research is to evaluate the strength and ductility behavior of confined concrete: by varying several confining reinforcement design parameters, like volumetric ratio, spacing, and yield stress. A total of 15 unconfined and confined geopolymer concrete specimens was produced and tested against axial loads. The test is carried out until the specimen collapses. Experimental results show that unconfined geopolymer concrete is highly brittle, characterized by very sharp post-peak behavior. The volumetric ratio, spacing, and yield stress of reinforcement play a significant role in determining the strength and ductility of confined geopolymer concrete. The comparison between the existing restraint models reviewed in the research was able to predict behavior before the peak of the experimental results very well. However, the existing confinement model has significantly different ductility behavior from the ductility behavior of the experimental results. In this research, an analytical expression of stress–strain for confined geopolymer concrete is developed by modifying the existing confinement model. The validation of confined concrete stress–strain between analytical expressions and experimental results is relatively close.
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Abadel, A. A. (2023). Structural performance of strengthening of high-performance geopolymer concrete columns utilizing different confinement materials: experimental and numerical study. Buildings, 13 (7), 1709. https://doi.org/10.3390/buildings13071709 (Crossref)
Ajmal, M. M., Qazi, A. U., Ahmed, A., Mughal, U. A., Abbas, S., Kazmi, S. M. S., & Munir, M. J. (2023). Structural performance of energy efficient geopolymer concrete confined masonry: an approach towards decarbonization. Energies, 16 (8), 3579. https://doi.org/10.3390/en16083579 (Crossref)
Alzeebaree, R., Çevik, A., Mohammedameen, A., Niş, A., & Gülşan, M. E. (2020). Mechanical performance of FRP-confined geopolymer concrete under seawater attack. Advances in Structural Engineering, 23 (6), 1055–1073. https://doi.org/10.1177/1369433219886964 (Crossref)
American Concrete Institution [ACI]. (2002). The use of fly ash in concrete (ACI 232 2R-96). American Concrete Institution. http://civilwares.free.fr/ACI/MCP04/2322r_96.pdf
American Society for Testing and Materials [ASTM]. (2005). Standard specification for coal fly ash and raw or calcined natural pozzolan for use (ASTM C 618-05). American Society for Testing and Materials.
Annamalai, S., Thirugnanasambandam, S., & Muthumani, K. (2017). Flexural behaviour of geopolymer concrete beams cured under ambient temperature. Asian Journal of Civil Engineering, 18 (4), 621–631.
Antonius, Imran, I., & Setiyawan, P. (2017). On the confined high-strength concrete and need of future research. Procedia Engineering, 171, 121–130. https://doi.org/10.1016/j.proeng.2017.01.318 (Crossref)
Bouzoubaâ, N., Zhang, M. H., & Malhotra, V. M. (1999). Production and performance of laboratory produced high volume fly ash blended cements in concrete. In ACI international symposium on concrete technology for sustainable development (pp. 1-13). International Centre for Sustainable Development of Cement and Concrete (ICON).
Diaz-Loya, E. I., Allouche, E. N., & Vaidya, S. (2011). Mechanical properties of fly-ash-based geopolymer concrete. ACI Materials Journal, 108 (3), 300–306. https://doi.org/10.14359/51682495 (Crossref)
Du, D. F., Wang, J. H., Wang, X., & Su, C. (2022). Compressive behavior and stress-strain model of square confined ambient-cured fly ash and slag-based geopolymer concrete. Case Studies in Construction Materials, 17 (June). https://doi.org/10.1016/j.cscm.2022.e01203 (Crossref)
Ekaputri, J. J., & Triwulan. (2011). Geopolymer concrete using fly ash, trass, Sidoarjo Mud based material. Journal of Civil Engineering, 31 (2), 57–63. http://dx.doi.org/10.12962/j20861206.v31i2.1466
Ganesan, N., Abraham, R., Raj, S. D., & Sasi, D. (2014). Stress-strain behaviour of confined Geopolymer concrete. Construction and Building Materials, 73, 326–331. https://doi.org/10.1016/j.conbuildmat.2014.09.092 (Crossref)
Haider, G. M., Sanjayan, J. G., & Ranjith, P. G. (2014). Complete triaxial stress-strain curves for geopolymer. Construction and Building Materials, 69, 196–202. https://doi.org/10.1016/j.conbuildmat.2014.07.058 (Crossref)
Hardjito, D., Wallah, S. E., Sumajouw, D. M. J., & Rangan, B. V. (2004). On the development of fly ash-based geopolymer concrete. ACI Materials Journal, 101 (6), 467–472. https://doi.org/10.14359/13485 (Crossref)
Herwani, H., Imran, I., Budiono, B., & Zulkifli, E. (2022). Strength enhancement, ductility, and confinement effectiveness index of fly ash-based geopolymer concrete square columns. Journal of Engineering and Technological Sciences, 54 (4), 1–16. https://doi.org/10.5614/j.eng.technol.sci.2022.54.4.11 (Crossref)
Lokuge, W., & Karunasena, W. (2016). Ductility enhancement of geopolymer concrete columns using fibre-reinforced polymer confinement. Journal of Composite Materials, 50 (14), 1887–1896. https://doi.org/10.1177/0021998315597553 (Crossref)
Lokuge, W., Sanjayan, J., & Setunge, S. (2015). Use of geopolymer concrete in column applications. In Proceedings of the 27th Biennial National Conference of the Concrete Institute of Australia (pp. 1-8). University of Southern Queensland. https://research.usq.edu.au/item/q3523/use-of-geopolymer-concrete-in-column-applications
Mander, J. B., Priestley, M. J., & Park, R. (1988). Theoretical stress-strain model for confined concrete. Journal of Structural Engineering, 114 (8), 1804–1826. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:8(1804) (Crossref)
Muslikh, Anggraini, N. K., Hardjito, D. & Antonius (2018). Behavior of geopolymer concrete confined with circular hoops. MATEC Web of Conferences, 159, 1–7. https://doi.org/10.1051/matecconf/201815901018 (Crossref)
Nagajothi, S., Elavenil, S., Angalaeswari, S., Natrayan, L., & Mammo, W. D. (2022). Durability studies on fly ash based geopolymer concrete incorporated with slag and alkali solutions. Advances in Civil Engineering, 2022, 7196446. https://doi.org/10.1155/2022/7196446 (Crossref)
Noushini, A., Aslani, F., Castel, A., Gilbert, R. I., Uy, B., & Foster, S. (2016). Compressive stress-strain model for low-calcium fly ash-based geopolymer and heat-cured Portland cement concrete. Cement and Concrete Composites, 73, 136–146. https://doi.org/10.1016/j.cemconcomp.2016.07.004 (Crossref)
Owaid, H. M., Al-Rubaye, M. M., & Al-Baghdadi, H. M. (2021). Use of waste paper ash or wood ash as substitution to fly ash in production of geopolymer concrete. Scientific Review Engineering and Environmental Sciences, 30 (3), 464–476. https://doi.org/10.22630/PNIKS.2021.30.3.39 (Crossref)
Romadhon, E. S., Antonius, & Sumirin. (2022). Mechanical Properties of Geopolymer Concrete Containing Low-Alkaline Activator. Annales de Chimie: Science Des Materiaux, 46 (5), 273–279. https://doi.org/10.18280/acsm.460506 (Crossref)
Sudha, C., Sambasivan, A. K., Kannan Rajkumar, P. R., & Jegan, M. (2022). Investigation on the performance of reinforced concrete columns jacketed by conventional concrete and geopolymer concrete. Engineering Science and Technology, an International Journal, 36, 101275. https://doi.org/10.1016/j.jestch.2022.101275 (Crossref)
Triwulan, M., Ekaputri, J. J., & Priyanka, N. F. (2017). The Effect of Temperature Curing on Geopolymer Concrete. MATEC Web of Conferences, 97, 01005. https://doi.org/10.1051/matecconf/20179701005 (Crossref)
Wang, T., Fan, X., Gao, C., Qu, C., Liu, J., & Yu, G. (2023). The influence of fiber on the mechanical properties of geopolymer concrete: A review. Polymers, 15 (4), 827. https://doi.org/10.3390/polym15040827 (Crossref)
Wang, H., Wu, Y., Wei, M., Wang, L., & Cheng, B. (2020). Hysteretic behavior of geopolymer concrete with active confinement subjected to monotonic and cyclic axial compression: An experimental study. Materials, 13 (18), 3997. https://doi.org/10.3390/ma13183997 (Crossref)
Wong, L. S. (2022). Durability performance of geopolymer concrete: A review. Polymers, 14 (5), 868. https://doi.org/10.3390/polym14050868 (Crossref)
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