Comparative durability of GFRP composite reinforcing bars in concrete and in simulated concrete environments

The results show that the percentage water uptake and the apparent diffusivity of the GFRP bars were strongly dependent on the type and temperature of the immersion solution

Allan Manalo; Ginghis Maranan; Brahim Benmokrane; Patrice Cousin; Omar Alajarmeh; Wahid Ferdous; Ray Liang; Gangarao Hota

2020

Scholarcy highlights

  • Many studies suggest that the durability of glass-fiber-reinforced-polymer bars in a simulated concrete pore solution is very different than the same bars in an actual concrete environment
  • This study conducted a comparative evaluation of the durability of GFRP bars in concrete and in simulated concrete environments by investigating their interlaminar shear strength
  • Bare GFRP bars and cement-embedded GFRP bars were immersed in solutions at different temperatures and for different exposure times
  • The results show that the percentage water uptake and the apparent diffusivity of the GFRP bars were strongly dependent on the type and temperature of the immersion solution
  • The alkaline solution was more aggressive to the GFRP bars than tap water or saline solution, affecting bar fiber, matrix interface, and chemical structure
  • As a result of this study, master curves and time-shift factors were developed to correlate the retention of interlaminar shear strength from the accelerated aging test to the service life of GFRP bars in an actual concrete environment

Need more features? Save interactive summary cards to your Scholarcy Library.