Lee Seung-Yun, Kim Sun-Hee, Choi Wonchang
Department of Architectural Engineering, Gachon University, Seongnam-si 13120, Republic of Korea.
Polymers (Basel). 2024 Dec 29;17(1):55. doi: 10.3390/polym17010055.
The absence of carbon fiber-reinforced rebar performance standards in Korea has limited its reliability. This study investigates the durability performance of carbon fiber-reinforced polymer rebar as an alternative to traditional steel reinforcement in concrete structures. Concrete beams reinforced with carbon fiber-reinforced polymer rebar were exposed to chloride environments for durations of 35 and 70 days and then subjected to bending tests to evaluate their durability. The results demonstrate that the strong bond between the carbon fiber-reinforced polymer and concrete effectively prevented brittle fracture, even under exposure to harsh chloride. A scanning electron microscope analysis of the specimens exposed to chloride showed no deterioration of the carbon fiber-reinforced polymer rebar, highlighting its exceptional resistance to corrosion. Furthermore, durability tests were conducted in a carbonation chamber for 8 and 12 weeks, with no signs of degradation in the carbon fiber-reinforced polymer rebar. These findings suggest that carbon fiber-reinforced polymer rebar offers excellent resistance to both chloride-induced corrosion and carbonation, making it a promising solution to enhance the longevity and durability of reinforced concrete structures exposed to aggressive environmental conditions.
韩国缺乏碳纤维增强钢筋性能标准，这限制了其可靠性。本研究调查了碳纤维增强聚合物钢筋作为混凝土结构中传统钢筋替代品的耐久性性能。用碳纤维增强聚合物钢筋加固的混凝土梁在氯化物环境中暴露35天和70天，然后进行弯曲试验以评估其耐久性。结果表明，即使在暴露于苛刻的氯化物环境下，碳纤维增强聚合物与混凝土之间的强粘结力也有效地防止了脆性断裂。对暴露于氯化物的试样进行扫描电子显微镜分析，结果显示碳纤维增强聚合物钢筋没有劣化，突出了其卓越的耐腐蚀性。此外，在碳化试验箱中进行了8周和12周的耐久性试验，碳纤维增强聚合物钢筋没有降解迹象。这些发现表明，碳纤维增强聚合物钢筋对氯化物引起的腐蚀和碳化均具有优异的抗性，使其成为提高暴露于侵蚀性环境条件下的钢筋混凝土结构寿命和耐久性的一个有前景的解决方案。
