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Dr. Gehan Abd-el-Rahman Ahmed Hamdy :: Publications:

Efficiency of Coating Layers Used for Thermal Protection of FRP Strengthened Beams
Authors: Osama A Kamal, Gehan A Hamdy, Mohamed A Abou-Atteya
Year: 2014
Keywords: Masonry; Nonlinear analysis; Historic structures; Domes; Vaults; FRP strengthening; fire exposure; fire protection, RC beams; flexural behavior
Journal: HBRC Journal, Journal of Housing and Building Research Center (HBRC) - Production and Hosting by Elsevier
Volume: 10
Issue: Not Available
Pages: 183–190
Publisher: El-Sevier
Local/International: International
Paper Link:
Full paper Gehan Abd-el-Rahman Ahmed Hamdy_P2014-EGY-Efficiency of coating layers used for thermal protection of FRP strengthened beams.pdf
Supplementary materials Not Available

This paper investigates the efficiency of coating layers used for thermal protection of Fiber-Reinforced Polymer (FRP) strengthened Reinforced Concrete (RC) beams. An experimental program was carried out on 36 RC beams protected by using different coating layers of Perlite, Vermiculite, Portland Cement (PC) mortar, clay and ceramic fiber. The tested beams were exposed to 100, 200, 300, 400, 500, and 600oC for 2 h, left to cool gradually, then tested to failure. The obtained results demonstrated that exposure to elevated temperature without protection reduces the residual flexural strength of RC beams by 20–66%, depending on the degree of temperature. Protecting RC beams by a 30 mm-thick layer of the tested materials was demonstrated to be efficient in reducing heat transfer through 2-h exposure to 600oC, and thus provide higher fire rating. Protection layers of cement mortar, Aswan clay, Vermiculite, Perlite and ceramic fiber blanket, showed residual flexural capacity equal to 61%, 68%, 72%, 73% and 74% that of the control beam, respectively. Moreover, using double coating layers of ceramic fiber followed by Perlite plaster, Vermiculite plaster, PC plaster or Aswan clay, with overall total thickness of 50 mm was demonstrated to give better protection, and maintain residual flexural capacity only 5% less than the flexural capacity of control beams.

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