Pultruded GFRP Reinforcing Bars with Carbon Nanotubes

  • Rahulreddy Chennareddy
  • Amr Riad
  • Mahmoud M. Reda Taha
Conference paper

Abstract

Pultrusion is a renowned method in industry to produce glass fiber reinforced polymer (GFRP) reinforcing bars. Pristine multiwalled carbon nanotubes (P-MWCNTs) and multiwalled carbon nanotubes (MWCNTs) with carboxyl functional group (COOH-MWCNTs) were dispersed into the vinyl ester resin to produce GFRP bars. The GFRP bars were produced using a pultrusion prototype facility recently developed at the University of New Mexico. Direct tension and short beam shear tests were conducted to determine the mechanical properties of the nano-modified GFRP reinforcing bars. The experimental program shows the ability of MWCNTs to improve the mechanical behavior of GFRP reinforcing bars by 20% and 111% for the tensile and shear strength, respectively. Of particular interest is the absence of the typical broom failure observed in neat GFRP when functionalized MWCNTs were used. The proposed nano-modification of GFRP using MWCNTs might enable overcoming many of the current limitations of GFRP reinforcing bars.

Notes

Acknowledgments

This work is funded by the TranSET University Transportation Center (UTC). The authors greatly acknowledge this support.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Rahulreddy Chennareddy
    • 1
  • Amr Riad
    • 2
  • Mahmoud M. Reda Taha
    • 1
  1. 1.Department of Civil EngineeringUniversity of New MexicoAlbuquerqueUSA
  2. 2.Department of Civil Engineering, Faculty of EngineeringAl-Azhar UniversityCairoEgypt

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