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Open AccessArticle

Improving Fatigue Performance of GFRP Composite Using Carbon Nanotubes

Department of Civil Engineering, University of New Mexico, Albuquerque, NM 87106, USA
Department of Civil Engineering, University of Virginia, Charlottesville, VA 22901, USA
Department of Civil Engineering, Assuit University, Assuit 71515, Egypt
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Jonathan Phillips
Fibers 2015, 3(1), 13-29;
Received: 14 November 2014 / Accepted: 6 January 2015 / Published: 15 January 2015
(This article belongs to the Special Issue Carbon Fibers)
Glass fiber reinforced polymers (GFRP) have become a preferable material for reinforcing or strengthening reinforced concrete structures due to their corrosion resistance, high strength to weight ratio, and relatively low cost compared with carbon fiber reinforced polymers (CFRP). However, the limited fatigue life of GFRP hinders their use in infrastructure applications. For instance, the low fatigue life of GFRP caused design codes to impose stringent stress limits on GFRP that rendered their use non-economic under significant cyclic loads in bridges. In this paper, we demonstrate that the fatigue life of GFRP can be significantly improved by an order of magnitude by incorporating Multi-Wall Carbon Nanotubes (MWCNTs) during GFRP fabrication. GFRP coupons were fabricated and tested under static tension and cyclic tension with mean fatigue stress equal to 40% of the GFRP tensile strength. Microstructural investigations using scanning electron microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopy were used for further investigation of the effect of MWCNTs on the GFRP composite. The experimental results show the 0.5 wt% and the 1.0 wt% MWCNTs were able to improve the fatigue life of GFRP by 1143% and 986%, respectively, compared with neat GFRP. View Full-Text
Keywords: carbon nanotubes; GFRP; applications; fatigue carbon nanotubes; GFRP; applications; fatigue
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Genedy, M.; Daghash, S.; Soliman, E.; Taha, M.M.R. Improving Fatigue Performance of GFRP Composite Using Carbon Nanotubes. Fibers 2015, 3, 13-29.

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