Abstract The durability of reinforced concrete structures is an ongoing challenge for engineers, particularly in harsh environments. In these conditions, concrete is susceptible to excessive cracking which allows water or other aggressive agents to penetrate the structure, thereby accelerating the deterioration, mainly through corrosion, of the steel reinforcement. The deteriorated concrete structures require frequent maintenance to achieve and extend their service life and may need expensive rehabilitation measures. The use of fibre-reinforced polymer (FRP) rebars, such as carbon and glass FRPs, can be an effective, sustainable and durable solution to enhance the durability of reinforced concrete structures in aggressive environments. Another type of FRP that has gained popularity in construction in the last two decades is basalt fibre-reinforced polymer (BFRP), which is the subject of the current paper. In order to investigate their behaviour, an experimental programme comprising five reinforced concrete beams and seven one-way spanning slabs has been conducted, and is described herein in detail. Three different types of reinforcement were included in the tests, namely sand-coated BFRP bars, ribbed BFRP bars as well as regular carbon steel reinforcement, for comparison. All of the members were tested up until failure. The test results are presented and analysed, with particular focus given to the cracking moment, ultimate moment capacity, deflections and also crack opening widths. The results are compared with the guidance currently available in several international design codes. In addition, based on the results and analysis presented herein, design recommendations for reinforced concrete with BFRP rebars are proposed.

中文翻译：

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玄武岩FRP钢筋混凝土构件抗弯性能试验研究

摘要 钢筋混凝土结构的耐久性是工程师面临的持续挑战，尤其是在恶劣环境中。在这些条件下，混凝土容易出现过度开裂，从而使水或其他侵蚀性物质渗透到结构中，从而加速钢筋的劣化，主要是通过腐蚀。老化的混凝土结构需要经常维护以实现和延长其使用寿命，并且可能需要昂贵的修复措施。使用纤维增强聚合物 (FRP) 钢筋，如碳纤维和玻璃纤维增​​强塑料，可以成为一种有效、可持续和耐用的解决方案，可提高钢筋混凝土结构在恶劣环境中的耐久性。在过去的二十年中，另一种在建筑中广受欢迎的 FRP 是玄武岩纤维增强聚合物 (BFRP)，这是当前论文的主题。为了研究它们的行为，已经进行了包括五个钢筋混凝土梁和七个单向跨板的实验程序，并在此进行了详细描述。测试中包括三种不同类型的钢筋，即涂砂 BFRP 钢筋、带肋 BFRP 钢筋以及常规碳钢钢筋，以进行比较。所有成员都经过测试，直到失败。对测试结果进行了呈现和分析，特别关注开裂力矩、极限力矩容量、挠度以及裂缝开口宽度。结果与几个国际设计规范中当前可用的指南进行了比较。此外，根据本文提出的结果和分析，提出了使用 BFRP 钢筋的钢筋混凝土的设计建议。