Effect of Post-Heated Concrete Cylinders Repaired with CFRP Reinforcement

Abstract:

This paper presents the experimental results of post-heated concrete cylinders repaired externally using Carbon Fibre Reinforced Polymer (CFRP) fabrics. Eighteen concrete cylinders of size 155mm x 300mm were exposed to different temperatures of 100, 200, and 300°C for 3 hours. Subsequently, the exposed concrete cylinders were naturally cooled down to room temperature and repaired externally using CFRP reinforcement. All these cylinders were tested to failure under axial loading. Results show that the residual strength of post-heated CFRP repaired concrete cylinders was significantly increased between 47 to 51% over the control cylinders. However, the ductility of CFRP repaired concrete cylinders was increased at the elevated temperatures.

• Periodical: Advanced Materials Research (Volume 626)
• Pages: 620-624
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.626.620
• Online since: December 2012
• Authors: Sharifah Salwa Mohd Zuki, J. Jayaprakash, Lee Kit Hock, Ong Chong Yong
• Keywords: Elevated Temperature, FRP, Plain Concrete, Repair

References

[1] M. Yaqub and C. G. Bailey: Repair of fire damaged circular reinforced concrete columns with FRP composites Construction and Building Materials Vol. 25 (2011), pp.359-370.

DOI: 10.1016/j.conbuildmat.2010.06.017

[2] M. Yaqub, C. G. Bailey and P. Nedwell: Axial capacity of post-heated square columns wrapped with FRP composites Cement and Concrete Composites Vol. 33 (2011), pp.694-701.

DOI: 10.1016/j.cemconcomp.2011.03.011

[3] M. Yaqub and C. G. Bailey: Cross sectional shape effects on the performance of post-heated reinforced concrete columns wrapped with FRP composites Composite Structures Vol. 93(2011), pp.1103-1117.

DOI: 10.1016/j.compstruct.2010.09.012

[4] Y. N. Chan, G. F. Peng, and M. Anson: Residual strength and pore structure of high-strength concrete and normal strength concrete after exposure to high temperatures Cement and Concrete Composites Vol. 21 (1999), pp.23-27.

DOI: 10.1016/s0958-9465(98)00034-1

[5] B. Georgali and P. E. Tsakiridis: Microstructure of fire-damaged concrete. A case study Cement and Concrete Composites Vol. 27 (2005), pp.255-259.

DOI: 10.1016/j.cemconcomp.2004.02.022

[6] J. Ingham: Forensic engineering of fire-damaged structures Proceedings of the ICE - Civil Engineering Vol. 162 (2009), pp.12-17.

[7] G.F. Peng, S.H. Bian, Z.Q. Guo, J. Zhao, X.L. Peng, and Y.C. Jiang: Effect of thermal shock due to rapid cooling on residual mechanical properties of fiber concrete exposed to high temperatures Construction and Building Materials Vol. 22 (2008).

DOI: 10.1016/j.conbuildmat.2006.12.002