A Study on the Flexural Performance of Para-aramid Fiber Reinforced Concrete Beams with Recycled Coarse Aggregates

IF 3.6 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

International Journal of Concrete Structures and Materials Pub Date : 2023-11-01 DOI:10.1186/s40069-023-00623-2

Jamshid Ruziev, Woosuk Kim

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Abstract

Abstract This study aims to investigate the effectiveness of para-aramid fiber sheet in enhancing the flexural performance of reinforced concrete (RC) beams made with Environmental-Friendly Recycled Coarse Aggregates. The experimental program examines the effect of substitution ratio of recycled aggregates (0%, 30%, and 50%), type of para-aramid fiber sheet (KN 206 RFL and KN AA070-RFL), and the method of fiber sheet attachment (bottom and bottom-side). The test results show that the ultimate load-carrying capacity of RC beams reinforced with para-aramid fiber sheet attached to the bottom and side parts increased by 23.9% compared to the unreinforced specimens. The main findings of the study include the identification of the BU-type attachment method as the most effective method for enhancing the flexural performance of reinforced concrete beams. The comparison of the experimental results with analytical predictions showed that the nominal flexural strength obtained from the experimental study was lower than the analytical predictions, but the ductile capacity of the specimens indicated the effectiveness of para-aramid fiber sheet reinforcement in EFRCA RC beams for flexural strength. The study highlights the potential of using para-aramid fiber sheet in improving the flexural behavior of RC beams made with recycled aggregates, offering a sustainable solution for the construction industry.

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再生粗骨料对芳纶纤维混凝土梁抗弯性能研究

摘要本研究旨在探讨对芳纶纤维片材对环保再生粗骨料钢筋混凝土梁抗弯性能的提高效果。实验方案考察了再生骨料替代率(0%、30%和50%)、对芳纶纤维片材类型(KN 206 RFL和KN AA070-RFL)以及纤维片材附着方式(底部和底部)的影响。试验结果表明，底部和侧部附加对芳纶纤维板加固梁的极限承载力比未加筋梁提高了23.9%。研究的主要发现包括确定了bu型连接方法是提高钢筋混凝土梁抗弯性能的最有效方法。试验结果与分析预测结果的比较表明，试验研究得到的名义抗弯强度低于分析预测，但试件的延性能力表明了对芳纶纤维板增强EFRCA RC梁抗弯强度的有效性。该研究强调了使用对芳纶纤维板在改善用再生骨料制成的RC梁的弯曲性能方面的潜力，为建筑行业提供了可持续的解决方案。

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来源期刊

International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL

CiteScore

6.30

自引率

5.90%

发文量

审稿时长

13 weeks

期刊介绍： The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.