Feasibility of Basalt FRP bars in reinforced concrete structures

腐蚀是世界范围内钢筋混凝土基础设施面临的一个严重问题。纤维增强聚合物(FRP)钢筋已成为暴露在腐蚀性环境中的混凝土结构中钢筋的一种可行的替代方案。玻璃纤维增强塑料(GFRP)和碳纤维增强塑料(GFRP)钢筋已在加拿大的许多现场应用中使用。目前正在开发一种由玄武岩纤维(BFRP)组成的有前途的新型复合增强材料。玄武岩是一种环保的天然纤维。玄武岩玻璃钢比玻璃纤维具有更高的强度和弹性系数，比碳纤维更具成本效益。这使得玄武岩玻璃钢筋成为建筑业现有产品的极佳替代方案。本研究旨在探讨一种新型BFRP筋作为混凝土结构加固的可行性，并将为BFRP筋的力学性能提供基准数据，这些力学性能对钢筋混凝土至关重要：抗拉强度和弹性模数、与混凝土的粘结力和横向剪切(传力)强度。拟议的研究所在的领域对加拿大的基础设施具有高度的经济和技术重要性。更好地了解玄武岩玻璃钢筋的力学性能将使建筑业能够在新结构中使用这种加固材料；并使工程师能够设计更持久和更可持续的基础设施。

Corrosion is a serious problem facing steel reinforced concrete infrastructure worldwide. Fibre reinforced polymer (FRP) reinforcing bars have emerged as a viable alternative to steel rebar for concrete structures exposed to corrosive environments. Glass FRP (GFRP) and carbon FRP (GFRP) reinforcing bars have been used in a number of field applications in Canada. A promising new composite reinforcement comprised of basalt fibres (BFRP) is currently under development. Basalt is a natural fibre that is environmentally friendly. Basalt FRP has higher strength and modulus than Glass FRP and is more cost effective than Carbon FRP. This makes Basalt FRP bars an excellent alternative reinforcement to existing products for construction industry. This study aims to examine the feasibility of a new BFRP bar as reinforcement for concrete structures and will provide benchmark data on the mechanical properties of BFRP bars which are of primary importance for reinforced concrete: tensile strength and modulus of elasticity, bond to concrete and transverse shear (dowel) strength. The proposed research is in an area that is of high economic and technological importance to the Canada's infrastructure. A better understanding of the mechanical properties of Basalt FRP bars will allow the construction industry to use this reinforcement in new structures; and will enable engineers to design long lasting and more sustainable infrastructure.