How long service life for steel rebars and glass fiber rebars?
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The service life of steel rebars and glass fiber-reinforced polymer (GFRP) rebars varies based on different factors. Steel rebars are susceptible to corrosion, which can significantly impact their durability. On the other hand, GFRP rebars offer corrosion resistance, enhancing their longevity. Accelerated aging tests on GFRP rebars suggest a substantial decrease in tensile strength over time due to alkali-attack, especially under direct immersion conditions. In contrast, GFRP rebars with a guaranteed tensile strength of minimum 900 MPa can provide a service life of 100 years under sustained loads less than 50% of their maximum capacity. Despite the advantages of GFRP rebars, exposure to harsh environments like tropical climates can lead to significant degradation, with an estimated 65% loss in strength over a service life of 32 years.
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| Papers (5) | Insight |
|---|---|
| Service life for steel rebars and glass fiber rebars is not explicitly mentioned in the paper. The study focuses on fatigue shear performance rather than the service life of the rebars. | |
40 Citations | Steel rebars have a service life of 32 years, while glass fiber-reinforced polymer (GFRP) rebars lose 65% strength in the same period due to degradation in tropical environments. |
01 Jan 2019 1 Citations | Glass fiber reinforced polymer (GFRP) rebars offer extended durability compared to steel rebars due to corrosion resistance, potentially leading to a longer service life in aggressive environments. |
| For glass fiber reinforced polymer (GFRP) rebars with 900 MPa tensile strength, a service life of 100 years is guaranteed when sustained load is <50% of maximum capacity. Service life for steel rebars is not addressed in the paper. | |
7 Citations | Glass fiber-reinforced polymer (GFRP) rebars exhibit decreased tensile strength in alkaline environments, suggesting a shorter service life compared to steel rebars in concrete structures. |
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