Abstract This study investigates the influence of basalt fiber reinforced concrete (BFRC) on the bond durability of helically wrapped basalt fiber reinforced polymers (HWBFRP) bars subjected to harsh saline environmental conditions. A total of 63 pullout specimens were fabricated and tested. Test parameters included conditioning duration (30, 60 and 90 days), conditioning temperature (35 and 60 °C), and the volume fraction of basalt macrofibers (BMF) added in the concrete mixture (0, 0.5 and 1%). Moreover, scanned electron microscopy (SEM) analysis was conducted to investigate the degradation of the HWBFRP bars. Additionally, two existing analytical models, the BPE and CMR models were calibrated using the experimental results for a better prediction of the bond-slip behavior of HWBFRP bars. The service life prediction of the bond strength after 50 years of service was also performed. Experimental results revealed that the addition of BMF to concrete improved the bond performance of HWBFRP bars and showed higher retentions in the bond strength compared to plain concrete specimens after 90 days of environmental conditioning, particularly at high temperatures. Moreover, the CMR model showed better reliability than the BPE model in describing the bond-slip behavior of HWBFRP bars in both plain and fiber reinforced concrete.

中文翻译：

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盐环境中玄武岩 FRP 钢筋与纤维增强混凝土的粘结耐久性

摘要 本研究研究了玄武岩纤维增强混凝土 (BFRC) 对严酷盐碱环境条件下螺旋缠绕玄武岩纤维增强聚合物 (HWBFRP) 钢筋粘结耐久性的影响。总共制造和测试了 63 个拉拔试样。测试参数包括调节持续时间（30、60 和 90 天）、调节温度（35 和 60 °C）以及添加到混凝土混合物中的玄武岩长纤维 (BMF) 的体积分数（0、0.5 和 1%）。此外，还进行了扫描电子显微镜 (SEM) 分析以研究 HWBFRP 条的降解情况。此外，两个现有的分析模型，BPE 和 CMR 模型使用实验结果进行校准，以更好地预测 HWBFRP 钢筋的粘结滑移行为。还进行了 50 年使用后粘合强度的使用寿命预测。实验结果表明，在环境调节 90 天后，尤其是在高温下，向混凝土中添加 BMF 提高了 HWBFRP 钢筋的粘结性能，并且与素混凝土试样相比，其粘结强度保持率更高。此外，CMR 模型在描述普通和纤维增强混凝土中 HWBFRP 钢筋的粘结滑移行为方面表现出比 BPE 模型更好的可靠性。