Experimental and numerical study on flexural properties of shredded prepreg carbon cloth waste fibre reinforced concrete

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability Pub Date : 2025-06-04 DOI:10.1016/j.mtsust.2025.101149

Umar Ayaz Lone , Bin Zhao , Yangkai Fan , Zucan Zhou

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引用次数: 0

Abstract

Carbon fibre reinforced polymer (CFRP) is extensively employed across various industries due to its exceptional strength-to-weight ratio, corrosion resistance, and high tensile strength. However, its disposal presents significant environmental challenges, as conventional methods such as incineration and landfilling are becoming increasingly restricted due to environmental regulations. One opportunity for recycling and lessening ecological impact is provided by prepreg carbon cloth waste (PCCW), a byproduct of the CFRP manufacturing process. This study explores the utilization of PCCW, which is mechanically processed into shredded prepreg carbon cloth waste (SPCCW) fibres with lengths ranging from 5 to 40 mm and diameters between 0.1 and 1 mm, for concrete reinforcement. Concrete mixes were designed using C40-grade concrete with SPCCW fibre volume fractions of 0.5 %, 1.0 %, 1.5 %, and 2.0 %. The flexural properties were evaluated through three-point bending tests. Additionally, finite element analysis (FEA) was conducted to simulate stress distribution and crack propagation in SPCCW fibre-reinforced concrete. Specific error margins between the simulated and experimental data are mentioned, such as the 1.9 % error in predicting flexural strength, which highlights the accuracy of the finite element model. In this study, the Visco-polymerization cracking model was selected to simulate the cohesive crack propagation in SPCCW-reinforced concrete alongside the concrete plastic damage model to capture the non-linear behaviour of concrete under both tensile and compressive stresses. The experimental results revealed a marked reduction in slump, with the greatest reduction (81.8 %) observed at higher fibre contents. Optimal mechanical performance was achieved at 1.0 % fibre content, where flexural strength increased by 24.9 %. The inclusion of SPCCW fibres facilitated improved stress redistribution and delayed crack initiation and propagation, which was further validated through numerical simulations. The load-bearing capacity peaked following crack initiation, and the concrete exhibited its highest principal stress capacity at 1.0 % fibre content.

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粉碎预浸炭布废纤维增强混凝土抗弯性能的试验与数值研究

碳纤维增强聚合物（CFRP）由于其卓越的强度重量比，耐腐蚀性和高抗拉强度而广泛应用于各个行业。然而，由于环境法规的限制，焚烧和填埋等传统方法越来越受到限制，其处理带来了重大的环境挑战。预浸碳布废料（PCCW）提供了一个回收和减少生态影响的机会，这是碳纤维增强塑料制造过程的副产品。本研究探讨如何利用预浸炭布废料，将其机械加工成长度为5至40毫米，直径为0.1至1毫米的碎预浸炭布废料（SPCCW）纤维，用于混凝土加固。混凝土配合比采用SPCCW纤维体积分数分别为0.5%、1.0%、1.5%和2.0%的c40级混凝土。通过三点弯曲试验评估了其抗弯性能。此外，对SPCCW纤维混凝土的应力分布和裂缝扩展进行了有限元分析。文中还提到了模拟数据与实验数据之间的具体误差范围，例如预测抗弯强度的误差为1.9%，这突出了有限元模型的准确性。在本研究中，选择粘聚开裂模型和混凝土塑性损伤模型来模拟spccw -钢筋混凝土的内聚裂纹扩展，以捕捉混凝土在拉应力和压应力下的非线性行为。实验结果显示，坍落度显著降低，纤维含量越高，坍落度降低幅度越大（81.8%）。当纤维含量为1.0%时，达到了最佳的机械性能，其中抗弯强度提高了24.9%。SPCCW纤维的加入促进了应力的重新分布，延迟了裂纹的萌生和扩展，这一点通过数值模拟得到了进一步的验证。混凝土的承载能力在裂缝萌生后达到峰值，纤维含量为1.0%时主应力承载力最高。

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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来源期刊

Materials Today Sustainability Multiple-

CiteScore

5.80

自引率

6.40%

发文量

174

审稿时长

32 days

期刊介绍： Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science. With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.