Strengthening of Fire Damaged, Light Weight, High Strength Reinforced Concrete Beam Using SIFCON Jacket

Ahmed Habeeb Albo Sabar, Mohammed Mansour Kadhum


This study aims to extrapolate the behavior of lightweight (LECA) high strength concrete beams subjected to high temperatures. the LECA aggregate was utilized as coarse fraction in the reference mixture. a post development process in terms of jacketing the fire damaged beams with SIFCON materials layer was also investigated. In addition to the reference samples, various parameters of concrete beams and conditioning were conducted, namely, fire duration exposure, concrete cover, and SIFCON layer thickness. In details, two concrete cover thickness, half and one-hour fire duration exposure, and two SIFCON layer thicknesses were the main parameters in this study. the thermal gradient through the beam cross section was captured through installing thermocouples sensors embedded inside at various location. The physical and chemical properties were tested for all used materials in this study. Overall, fourteen concrete beam samples were tested for all the three phases (normal or reference, fire damaged samples, and post enhancement with SIFCON jacket). the level of comparison for the tested samples was focused on several parameters are; maximum shear load capacity and corresponded displacement, ductility index, cracking load, initial and secant stiffness, and energy absorption. The experimental test results under the scope of this research have shown significant improvement for the strengthened beams were observed compared with the damaged samples. Moreover, the results have cleared that the strengthened beams, in term of the mentioned indices were recovered as and comparable to the undamaged (reference beam), except the absorption energy. Where further studies and efforts have to be paid to overcome such issue.

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K. G. Babu and D. S. Babu, “Behaviour of lightweight expanded polystyrene concrete containing silica fume,” Cem. Concr. Res., vol. 33, no. 5, pp. 755–762, 2003, doi: 10.1016/S0008-8846(02)01055-4.

A. Kiliç, C. D. Atiş, E. Yaşar, and F. Özcan, “High-strength lightweight concrete made with scoria aggregate containing mineral admixtures,” Cem. Concr. Res., vol. 33, no. 10, pp. 1595–1599, 2003, doi: 10.1016/S0008-8846(03)00131-5.

I. B. Topçu and T. Uygunoǧlu, “Properties of autoclaved lightweight aggregate concrete,” Build. Environ., vol. 42, no. 12, pp. 4108–4116, 2007, doi: 10.1016/j.buildenv.2006.11.024.

L. Alarcon-Ruiz, G. Platret, E. Massieu, and A. Ehrlacher, “The use of thermal analysis in assessing the effect of temperature on a cement paste,” Cem. Concr. Res., vol. 35, no. 3, pp. 609–613, 2005, doi: 10.1016/j.cemconres.2004.06.015.

R. H. Haddad and L. G. Shannis, “Post-fire behavior of bond between high strength pozzolanic concrete and reinforcing steel,” Constr. Build. Mater., vol. 18, no. 6, pp. 425–435, 2004, doi: 10.1016/j.conbuildmat.2004.03.006.

A. Khalifa and A. Nanni, “Kalifa2002.Pdf,” vol. 16, pp. 135–146, 2002.

A. F. Ashour, S. A. El-Refaie, and S. W. Garrity, “Flexural strengthening of RC continuous beams using CFRP laminates,” Cem. Concr. Compos., vol. 26, no. 7, pp. 765–775, 2004, doi: 10.1016/j.cemconcomp.2003.07.002.

B. B. Adhikary and H. Mutsuyoshi, “Shear strengthening of RC beams with web-bonded continuous steel plates,” Constr. Build. Mater., vol. 20, no. 5, pp. 296–307, 2006, doi: 10.1016/j.conbuildmat.2005.01.026.

J. Zhou and L. Wang, “Repair of fire-damaged reinforced concrete members with axial load: a review,” Sustainability, vol. 11, no. 4, p. 963, 2019.

Y. C. Kog, “Practical Guide for the Assessment and Repair of Fire-Damaged Concrete Building Structures,” Pract. Period. Struct. Des. Constr., vol. 26, no. 2, p. 4021010, 2021.

C. K. Ng and K. H. Tan, “Flexural behaviour of externally prestressed beams. Part I: Analytical model,” Eng. Struct., vol. 28, no. 4, pp. 609–621, 2006.

V. S. Kumar and P. Ariyannan, “Retrofitting of RC beam using SIMCON laminate,” Int. J. Emerg. Technol. Comput. Sci. Electron., vol. 20, no. 3, pp. 219–225, 2016.

M. J. Shannag and R. Al-Rousan, “Shear strengthening of high-strength reinforced concrete beams using fibrous composites,” Mag. Concr. Res., vol. 56, no. 7, pp. 419–428, 2004, doi: 10.1680/macr.2004.56.7.419.

O. Sengul, “Mechanical properties of slurry infiltrated fiber concrete produced with waste steel fibers,” Constr. Build. Mater., vol. 186, pp. 1082–1091, 2018.

P. Deepesh and K. Jayant, “Study of mechanical and durability properties of SIFCON by partial replacement of cement with fly ash as defined by an experimental based approach,” Int. J. Innov. Res. Sci. Technol., vol. 5, no. 5, pp. 8568–8574, 2016.

M. A. Elnono, H. M. Salem, A. M. Farahat, and A. H. Elzanaty, “Use of slurry infiltrated fiber concrete in reinforced concrete corner connections subjected to opening moments,” J. Adv. Concr. Technol., vol. 7, no. 1, pp. 51–59, 2009.

A. S. Ali and Z. Riyadh, “Experimental and Numerical Study on the Effects of Size and type of Steel Fibers on the (SIFCON) Concrete Specimens,” Int. J. Appl. Eng. Res., vol. 13, no. 2, pp. 1344–1353, 2018.

A. M. Hashim and M. M. Kadhum, “Compressive strength and elastic modulus of slurry infiltrated fiber concrete (SIFCON) at high temperature,” Civ. Eng. J., vol. 6, no. 2, pp. 265–275, 2020.

S. Salih, Q. Frayyeh, and M. Ali, “Fresh and some mechanical properties of sifcon containing silica fume,” in MATEC Web of Conferences, 2018, vol. 162, p. 2003.

K. Dagar, “Slurry infiltrated fibrous concrete (SIFCON),” Int. J. Appl. Eng. Technol., vol. 2, no. 2, pp. 99–100, 2012.

S. Saleh and M. M. Kadhum, “Experimental and Numerical Investigation for the Behavior of Hollow Slurry Infiltrated Fibrous Concrete (SIFCON) Columns,” 2015.

M. S. Abdulraheem and M. M. Kadhum, “Effect of Fire Exposed on the Behavior of Reactive Powder Concrete Columns under Concentric Compression Loading,” 2017.



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Copyright (c) 2022 Ahmed Habeeb Albo Sabar, Mohammed Mansour Kadhum

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ISSN: 2303-4521

Digital Object Identifier DOI: 10.21533/pen

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License