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Advances in Concrete Construction Volume 15, Number 4, April 2023 , pages 251-267 DOI: https://doi.org/10.12989/acc.2023.15.4.251 |
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 open accessAssessment of the characteristics of ferro-geopolymer composite box beams under flexure |
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Dharmar Sakkarai and Nagan Soundarapandian
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| Abstract | ||
| In this paper, an experimental investigation is carried out to assess the inherent self-compacting properties of geopolymer mortar and its impact on flexural strength of thin-walled ferro-geopolymer box beam. The inherent self-compacting properties of the optimal mix of normal geopolymer mortar was studied and compared with self-compacting cement mortar. To assess the flexural strength of box beams, a total of 3 box beams of size 1500 mm × 200 mm × 150 mm consisting of one ferrocement box beam having a wall thickness of 40 mm utilizing self-compacting cement mortar and two ferro-geopolymer box beams with geopolymer mortar by varying the wall thickness between 40 mm and 50 mm were moulded. The ferro-cement box beam was cured in water and ferro-geopolymer box beams were cured in heat chamber at 75°C - 80°C for 24 hours. After curing, the specimens are subjected to flexural testing by applying load at one-third points. The result shows that the ultimate load carrying capacity of ferro-geopolymer and ferro-cement box beams are almost equal. In addition, the stiffness of the ferrogeoploymer box beam is reduced by 18.50% when compared to ferro-cement box beam. Simultaneously, the ductility index and energy absorption capacity are increased by 88.24% and 30.15%, respectively. It is also observed that the load carrying capacity and stiffness of ferro-geopolymer box beams decreases when the wall thickness is increased. At the same time, the ductility and energy absorption capacity increased by 17.50% and 8.25%, respectively. Moreover, all of the examined beams displayed a shear failure pattern. | ||
| Key Words | ||
| box beam; ferro-cement; ferro-geopolymer; flexural behavior; self-compacting mortar | ||
| Address | ||
| (1) Dharmar Sakkarai: Department of Civil Engineering, Ramco Institute of Technology, Rajapalayam, Tamilnadu, India; (2) Nagan Soundarapandian: Department of Civil Engineering, Thiagarajar College of Engineering, Madurai, Tamilnadu, India. | ||
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