Performance of Beams Incorporating Geopolymer and FRP Bars: A Review

Construction Technologies and Architecture Pub Date : 2024-06-14 DOI:10.4028/p-kkpf30

Ahlam Jebur Kadhim, Othman Hameed Zinkaah

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Abstract

Recently, civil engineering fields are seeking for the use of cost-effective, lightweight, durable, and environmentally friendly materials, giving less maintenance and providing long durability and resistance to hostile conditions. Therefore, there has been significant progress in the utilization of sophisticated composite materials as a reinforcement for various structural elements in the context of new construction buildings or rehabilitation.Fibre-reinforced polymer (FRP) are composite materials that have emerged as a potential method for enhancing the strength of concrete structures. FPR has been recommended for its many benefits, including thermal insulation properties, corrosion resistance ability, high tensile strength, fatigue resistance, and lightweight. Environmental deterioration increases the need for sustainable, durable, and mechanically sound reinforced concrete (RC) elements. Thus, geopolymer concrete (GPC) made from industrial byproducts like fly ash, slag, aluminum-rich materials, and the alkali activators (needed for alkaline solutions to activate the geopolymerization process) stands as a promising substitute for conventional Portland cement, owing to its engineering characteristics and sustainable nature (low CO2 emissions and industrial waste).In conclusion, Results discovred that the compressive strength of GPC can reach values of 70-100 MPa within 28 days. FRP-reinforced geopolymer concrete has a wide range of possible applications, however, there are still many barriers to commercializing FRP in the construction industry. Review indicated that the distinct properties of FRP bars embedded in GPC can provide a promising technology for the construction of new structures with high sustainability, sufficient strength, and structural integrity. Ductility ratios for GPC beams were 5% to 34% higher than those for reinforced OPC beams. Compared to steel-GPC beams, FRP-GPC beams deflect and fracture more due to their lower modulus of elasticity. Therefore, it is possible to use geopolymer concrete with a combination of steel bars and FRP in order to overcome the disadvantages of using only FRP or steel.

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包含土工聚合物和玻璃钢条的梁的性能：综述

最近，土木工程领域正在寻求使用具有成本效益、轻质、耐用和环保的材料，以减少维护，并提供长期的耐用性和对恶劣条件的抵抗力。纤维增强聚合物（FRP）是一种复合材料，已成为增强混凝土结构强度的潜在方法。纤维增强聚合物（FRP）是一种复合材料，已成为增强混凝土结构强度的潜在方法。FPR 具有许多优点，包括隔热性能、耐腐蚀能力、高抗拉强度、抗疲劳性和轻质，因此受到推荐。环境的恶化增加了对可持续、耐用且机械性能良好的钢筋混凝土（RC）构件的需求。因此，由粉煤灰、矿渣、富铝材料等工业副产品以及碱激活剂（激活土工聚合过程所需的碱性溶液）制成的土工聚合物混凝土（GPC）因其工程特性和可持续发展性（低二氧化碳排放量和工业废物），有望成为传统波特兰水泥的替代品。玻璃钢加固的土工聚合物混凝土具有广泛的应用前景，然而，玻璃钢在建筑行业的商业化应用仍面临许多障碍。研究表明，嵌入土工聚合物混凝土中的玻璃钢棒材具有独特的性能，可为建造具有高可持续性、足够强度和结构完整性的新型结构提供一项前景广阔的技术。GPC 梁的延性比加固的 OPC 梁高 5%至 34%。与钢-GPC 梁相比，玻璃纤维增强塑料-GPC 梁由于弹性模量较低，挠曲和断裂程度更大。因此，土工聚合物混凝土可以与钢筋和玻璃钢结合使用，以克服仅使用玻璃钢或钢筋的缺点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Construction Technologies and Architecture

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