The Fire Exposure Effect on Hybrid Reinforced Reactive Powder Concrete Columns

Hasanain A. Shubbar, Nameer A. Alwash


This paper offers an experimental investigation of the fiber reinforced reactive powder concrete columns' behavior after exposure to fire and improvements made to improve column resistance against fire. This study is mainly aimed to study the experimental behavior of hybrid reinforced columns produced by reactive concrete powder (RPC) and exposure to the flame of fire at one side and subjected to eccentric load. The experimental methodology consists of sixteen RC columns that organized into four groups based on the variables used in this research: (SF) steel fibers, (PP) polypropylene fibers, (HB) hybrid fibers, (PPC-SF) hybrid cross-section (steel fiber reactive powder concrete core with polypropylene fiber reactive powder concrete cover). All columns were tested under 60 mm eccentric load and the burn columns were exposed to fire for different duration (1, 1.5 and 2) hours. The results indicated that (SF-RPC, PP-RPC, HB-RPC, PPC-SFRPC) columns exposed to a fire flame for the period 2 hours, lost from their load capacity by about (54.39, 40.03, 34.69 and 30.68) % respectively. The main conclusion of this paper is that the best fire resistance of the column obtained when using a hybrid cross-section (steel fiber reactive powder concrete core with polypropylene fiber reactive powder concrete cover).


Reactive Powder Concrete (RPC); Hybrid Cross Section Column; Hybrid Fibers (HB); Exposed to Fire and Eccentric Load.


Darwin, David, Charles William Dolan, and Arthur H. Nilson. Design of concrete structures. McGraw-Hill Education, (2016).

Richard, Pierre, and Marcel Cheyrezy. “Composition of Reactive Powder Concretes.” Cement and Concrete Research 25, no. 7 (October 1995): 1501–1511. doi:10.1016/0008-8846(95)00144-2.

Hekmet H.M. “Analysis and Behavior of RPC T-Beams in Flexural”, Thesis, Building and Construction Engineering Department, (2014): University of Technology, Baghdad.

Poon, C.S., Z.H. Shui, and L. Lam. “Compressive Behavior of Fiber Reinforced High-Performance Concrete Subjected to Elevated Temperatures.” Cement and Concrete Research 34, no. 12 (December 2004): 2215–2222. doi:10.1016/j.cemconres.2004.02.011.

Kodur, Venkatesh Kumar R., and Mohamad A. Sultan. "Structural behaviour of high strength concrete columns exposed to fire." (1998): 217-232.

Kodur, Venkatesh, and Richard Mcgrath. "Fire endurance of high strength concrete columns." Fire technology 39, no. 1 (2003): 73-87. doi:10.1023/A:1021731327822.

Sarker, Prabir Kumar, and Simon Mcbeath. “Fire Endurance of Steel Reinforced Fly Ash Geopolymer Concrete Elements.” Construction and Building Materials 90 (August 2015): 91–98. doi:10.1016/j.conbuildmat.2015.04.054.

Hibner, D.R. “Residual Axial Capacity of Fire Exposed Reinforced Concrete Columns”. (2017). Michigan State University.

Shi, Xudong, Teng-Hooi Tan, Kang-Hai Tan, and Zhenhai Guo. "Influence of concrete cover on fire resistance of reinforced concrete flexural members." Journal of Structural Engineering 130, no. 8 (2004): 1225-1232. doi:10.1061/(ASCE)0733-9445(2004)130:8(1225).

Kigha, F, JA Sadeeq, and OS Abejide. “Effects of Temperature Levels and Concrete Cover Thickness on Residual Strength Characteristics of Fire Exposed Reinforced Concrete Beams.” Nigerian Journal of Technology 34, no. 3 (June 27, 2015): 429. doi:10.4314/njt.v34i3.1.

Raut, N. and Kodur, V. “Response of Reinforced Concrete Columns under Fire-Induced Biaxial Bending.” ACI Structural Journal 108, no. 5 (2011). doi:10.14359/51683218.

Emberley, R.L. “A Study into the Behavior of Reinforced-Concrete Columns under Fire Exposures using a Spreadsheet-Based Numerical Model” (2013). Available online:

Abdulraheem, Mustafa S., and Mohammed M. Kadhum. “Experimental and Numerical Study on Post-Fire Behaviour of Concentrically Loaded Reinforced Reactive Powder Concrete Columns.” Construction and Building Materials 168 (April 2018): 877–892. doi:10.1016/j.conbuildmat.2018.02.123.

Abdulraheem, Mustafa S., and Mohammed M. kadhum. “Experimental Investigation of Fire Effects on Ductility and Stiffness of Reinforced Reactive Powder Concrete Columns under Axial Compression.” Journal of Building Engineering 20 (November 2018): 750–761. doi:10.1016/j.jobe.2018.07.028.

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DOI: 10.28991/cej-2020-03091476


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