Combined effects of saline solution and moist concrete on long-term durability of GFRP reinforcing bars

This paper presents the mechanical, durability, and microstructural characterization of unstressed glass–fiber-reinforced-polymer reinforcing bars exposed to concrete environment and saline solutions under accelerating conditions

Mathieu Robert; Brahim Benmokrane

2012

Scholarcy highlights

  • This paper presents the mechanical, durability, and microstructural characterization of unstressed glass–fiber-reinforced-polymer reinforcing bars exposed to concrete environment and saline solutions under accelerating conditions
  • The pre- and postexposure tensile strengths of the bars were used for long-term property predictions based on the Arrhenius theory
  • The results revealed no significant differences in the durability of the concrete-wrapped GFRP bars whether immersed in salt solution or tap water and the very high long-term durability of the GFRP bars in salt solution
  • Even after a service life of 100 years, the tensile-strength retention of the tested GFRP bar would still be 70% and 77% for mean annual temperatures of 50 °C and 10 °C, respectively, which are higher than the design tensile strength according to the ACI 440.1R
  • ► A durability study of GFRP bars submitted to salt solution and concrete is proposed. ► Mechanical and physical characterizations were performed on aged bars. ► GFRP bars have shown high tensile strength retention after aging. ► No chemical degradation of the polymer as detected after aging. ► Prediction of long-term tensile strength were performed

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