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Combined effects of saline solution and moist concrete on long-term durability of GFRP reinforcing bars
Highlights ► 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.
Abstract This paper presents the mechanical, durability, and microstructural characterization of unstressed glass–fiber-reinforced-polymer (GFRP) reinforcing bars exposed to concrete environment and saline solutions under accelerating conditions. These conditionings were used to simulate the effect of seawater or deicing salts on GFRP bars. 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. According to the predictions, even after a service life of 100years, the tensile-strength retention of the tested GFRP bar would still be 70% and 77% for mean annual temperatures of 50°C (the mean annual temperature and the marine environment of the Middle East and warm regions) and 10°C (mean average temperature of northern regions), respectively, which are higher than the design tensile strength according to the ACI 440.1R.
Combined effects of saline solution and moist concrete on long-term durability of GFRP reinforcing bars
Highlights ► 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.
Abstract This paper presents the mechanical, durability, and microstructural characterization of unstressed glass–fiber-reinforced-polymer (GFRP) reinforcing bars exposed to concrete environment and saline solutions under accelerating conditions. These conditionings were used to simulate the effect of seawater or deicing salts on GFRP bars. 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. According to the predictions, even after a service life of 100years, the tensile-strength retention of the tested GFRP bar would still be 70% and 77% for mean annual temperatures of 50°C (the mean annual temperature and the marine environment of the Middle East and warm regions) and 10°C (mean average temperature of northern regions), respectively, which are higher than the design tensile strength according to the ACI 440.1R.
Combined effects of saline solution and moist concrete on long-term durability of GFRP reinforcing bars
Robert, Mathieu (author) / Benmokrane, Brahim (author)
Construction and Building Materials ; 38 ; 274-284
2012-08-11
11 pages
Article (Journal)
Electronic Resource
English
Durability , Glass FRP , Bars , Salt , Alkaline , Concrete , Marine , Aging , Mechanical properties , Strength prediction
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