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玻璃纤维增强塑料废料对混凝土力学性能的影响及其在混凝土应用中再利用的可行性评估。

Effect of Glass Fiber-Reinforced Plastic Waste on the Mechanical Properties of Concrete and Evaluation of Its Feasibility for Reuse in Concrete Applications.

作者信息

Zhao Tianhao, Lv Yong, Chen Jianzhong, Song Pengfei, Sun Mingqing, Zhang Xiaoyu, Huang Li

机构信息

Hubei Key Laboratory of Theory and Application of Advanced Material Mechanics, School of Science, Wuhan University of Technology, Wuhan 430070, China.

Hengrun Group New Materials Co., Ltd., Hengshui 053100, China.

出版信息

Materials (Basel). 2023 Oct 19;16(20):6772. doi: 10.3390/ma16206772.

DOI:10.3390/ma16206772
PMID:37895753
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10608035/
Abstract

The disposal of glass fiber-reinforced plastic (GFRP) waste has become an urgent issue in both the engineering and environmental fields. In this study, the feasibility of reusing mechanically recycled GFRP in concrete was evaluated. Secondary screening of the recycled material was conducted to obtain different types of products, and the recycled GFRP (rGFRP) was characterized. Subsequently, the effect of rGFRP on concrete performance was evaluated using different dosages (0%, 1%, 3%, 5%) of rGFRP powder and rGFRP cluster (with different sizes and fiber contents) to replace fine aggregate in concrete preparation. The experimental results indicated that the addition of rGFRP powder has no significant impact on the mechanical properties of concrete, while the addition of a small amount of rGFRP cluster slightly improves the compressive strength and splitting tensile strength of concrete. Additionally, the short fibers in rGFRP improve the failure mode of concrete, and increased fiber content and longer fiber length demonstrate a more pronounced reinforcing effect. The challenges and potential directions for future research in the realm of reusing rGFRP in concrete are discussed at the end. A systematic process for reusing GFRP waste in concrete is proposed to address the primary challenges and provide guidance for its practical engineering application.

摘要

玻璃纤维增强塑料（GFRP）废料的处理已成为工程和环境领域的紧迫问题。在本研究中，评估了在混凝土中机械回收GFRP再利用的可行性。对回收材料进行二次筛选以获得不同类型的产品，并对回收的GFRP（rGFRP）进行表征。随后，在混凝土制备中使用不同剂量（0%、1%、3%、5%）的rGFRP粉末和rGFRP团簇（具有不同尺寸和纤维含量）替代细骨料，评估rGFRP对混凝土性能的影响。实验结果表明，添加rGFRP粉末对混凝土的力学性能没有显著影响，而添加少量rGFRP团簇可略微提高混凝土的抗压强度和劈裂抗拉强度。此外，rGFRP中的短纤维改善了混凝土的破坏模式，纤维含量增加和纤维长度变长表现出更显著的增强效果。最后讨论了在混凝土中再利用rGFRP领域未来研究的挑战和潜在方向。提出了在混凝土中再利用GFRP废料的系统流程，以应对主要挑战并为其实际工程应用提供指导。

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