Durability of Fibre Reinforced Polymer (FRP) rods in low carbon concrete

低碳混凝土中纤维增强聚合物 (FRP) 棒的耐久性

• 批准号: 2738755
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2738755
• 关键词: Durability; Fibre; Reinforced; Polymer; FRP

Fiber-Reinforced Polymer (FRP) bars have emerged as a promising alternative to conventional steel reinforcement in the construction industry due to their superior durability performance. FRP bars exhibit non-corrosive properties, effectively addressing the primary issue of steel corrosion-induced degradation in concrete structures. Steel corrosion can lead to prohibitive repair costs in civil infrastructure and brittle catastrophic failures (e.g., the collapse of Morandi bridge). Despite the corrosion-free nature of FRP rods, their matrix/resin component plasticises when exposed to humid conditions (e.g., at a concrete crack location) and degrades due to chemical attack. This is more critical for matrix dominated properties of concrete structures reinforced with FRP bars such as the bond, shear and transverse compressive strength of FRPs. This project focuses on a comprehensive examination of the long-term performance of Glass Fiber Reinforced Polymer (GFRP) and Basalt Fiber Reinforced Polymer (BFRP) bars under various environmental conditions by simulating aggressive environmental conditions, including elevated temperatures, saline, and alkaline exposures, to evaluate the performance of GFRP and BFRP bars.The project aims to create a test protocol that correlates FRP durability performance under accelerated ageing conditions and short-term exposures with actual on-site conditions. Key variables of interest are resin dominated properties in of FRPs and effect of stress conditions. This test protocol will shed light on the reliability of commonly applied accelerated ageing tests adopted in lab conditions. The test protocol is adopted for both resin samples and FRP bars to obtain an in-depth understanding of how the individual constituents, fiber, matrix perform but also the FRP system performs accounting also for fiber-matrix interfaces. The potential incorporation of FRP bars under applied stresses adds a crucial dimension by examining their degradation properties when subjected to load-bearing conditions while exposed to aggressive environments, closely mimicking real-world applications.FRP bars will be examined after being exposed to normal and accelerated conditions to be tested to measure their interlaminar and transverse shear strength. Non-exposed and pre-exposed FRP bars will be cast in concrete beams and blocks to measure the effect of exposure degradation on the bond and flexural performance of FRP bars in concrete structures. Resin samples will be cast, exposed, and tested separately to see the effect of direct exposure to pure resin samples after being tested in tension and shear. The type of exposure that will be used to understand the acceleration effect of the used protocol will be by comparing the degradation effect of directly exposed FRP samples in an alkaline mixture that replicates the pH and chemistry of concrete but at elevated temperatures to increase the diffusion to the composite material.The outcomes of this project offer wide-ranging benefits to the construction industry and sustainability endeavors:a. Enhanced Infrastructure Durability: The development of FRP bars with improved long-term performance can extend the lifespan of concrete structures, resulting in reduced maintenance costs and enhanced sustainability.b. Advancing Net-Zero Construction: The utilization of low carbon concrete reinforced with FRP bars aligns seamlessly with the UK's net-zero emissions targets, making this research directly relevant to sustainability goals.c. Industry-Wide Adoption: The newly established acceleration protocol can be readily adopted across the construction industry to assess the durability of FRP bars, ensuring the reliability and safety of construction projects.This project delves into the promising realm of Fiber-Reinforced Polymer (FRP) bars as a durable alternative to traditional steel reinforcement in construction while working towards more sustainable and durable approaches.

纤维增强的聚合物（FRP）棒已成为建筑行业传统钢筋的有前途的替代品，由于其出色的耐用性能。 FRP条具有非腐蚀性特性，有效地解决了钢腐蚀引起的混凝土结构中降解的主要问题。钢腐蚀会导致民用基础设施和脆弱性灾难性故障（例如，莫兰迪桥的崩溃）的过度维修成本。尽管FRP棒具有无腐蚀性，但其基质/树脂成分在暴露于潮湿条件（例如，在混凝土裂纹位置）并因化学攻击而降解时塑料。这对于由FRP棒增强的混凝土结构的矩阵主导性能（例如FRP的键，剪切和横向抗压强度）增强的更为至关重要。该项目侧重于对各种环境条件下在各种环境条件下的玻璃纤维增​​强聚合物（GFRP）和玄武岩纤维增强聚合物（BFRP）棒的长期性能，通过模拟积极的环境条件，包括积极的环境条件，包括较高的温度，盐水，盐水，盐水，碱性曝光率，以评估GRP和BFRP的绩效，以促进GFRP和BFRP的绩效。具有实际现场条件的加速衰老条件和短期暴露。感兴趣的关键变量是树脂在FRP中的主导特性和应力条件的影响。该测试方案将阐明实验室条件下采用的常用加速老化测试的可靠性。树脂样品和FRP棒都采用了测试协议，以深入了解单个成分，光纤，基质的执行方式，但FRP系统也针对光纤矩阵接口进行了会计。在施加应力下，FRP条的潜在合并增加了至关重要的维度，通过检查其降解性能在承受负载条件时，在暴露于侵略性环境的同时，密切模仿现实世界的应用。FRP棒将在暴露于正常和加速条件后测试以测量其间层间的sher层和跨性别的shear和跨性别的shear和跨性别的shear和跨性别的shear。不暴露和预先暴露的FRP条将在混凝土梁和块中施放，以测量暴露降解对混凝土结构中FRP棒键和弯曲性能的影响。树脂样品将分别施放，暴露和测试，以查看在张力和剪切中进行测试后直接暴露于纯树脂样品的效果。将用于理解使用协议的加速度效果的暴露类型将是通过比较碱性混合物中直接暴露的FRP样品的降解效应，该碱性混合物复制混凝土的pH和化学性能，但在温度升高的情况下，以将扩散到综合材料的扩散为构建范围的效率增强到建筑业和可持续行业的能力。增强的基础设施耐用性：具有改善长期性能的FRP棒的开发可以延长混凝土结构的寿命，从而降低维护成本和增强的可持续性b。推进零净结构：与FRP棒的使用低碳混凝土的利用与英国的净零排放量目标无缝一致，这使得这项研究与可持续性目标直接相关。整个行业的采用：新建立的加速协议可以在整个建筑行业中很容易通过，以评估FRP酒吧的耐用性，确保建筑项目的可靠性和安全性。该项目探究了纤维增强的聚合物（FRP）酒吧的有希望的领域，这是传统的钢铁在建筑中耐用的替代方案，同时又可以维持和更可持续的方法。