玻纤复材固废粗纤维增强混凝土的力学性能  

Mechanical properties of concrete reinforced with macro fibres recycled from waste GFRP

作　　者：邹祺祺 陈建飞 付兵 滕锦光[4] ZOU Qiqi;CHEN Jianfei;FU Bing;TENG Jinguang(Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China;School of Astronautics,Harbin Institute of Technology,Harbin 150006,China;School of Mechanics and Construction Engineering,Jinan University,Guangzhou 510632,China;Department of Civil and Environment Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China)

机构地区：[1]南方科技大学海洋科学与工程系,深圳518055 [2]哈尔滨工业大学航天学院,哈尔滨150006 [3]暨南大学力学与建筑工程学院,广州510632 [4]香港理工大学土木及环境工程学系,中国香港999077

出　　处：《复合材料学报》2025年第3期1489-1501,共13页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52178218,52150710542,52178212);深圳市科技计划资助(KCXST20221021111409023)。

摘　　要：树脂基纤维增强复合材料(FRP,简称“复材”)具有轻质、高强、耐腐蚀等突出优点,广泛应用于建筑、交通、能源、航空航天及体育等行业。复合材料生产过程和寿命终端产生了大量的复材固体废弃物,其中95%以上为玻璃纤维增强复合材料(GFRP,简称“玻纤复材”)。玻璃纤维附加值较低且力学性能易在回收处理后显著降低,因此玻纤复材固废的回收经济性不强。本研究团队此前提出了通过机械切割将玻纤复材固废加工成粗纤维,并用于制备粗纤维混凝土(MFRC)。本文通过一系列轴压和劈拉试验,研究粗纤维体积掺量、厚度、长度对两种配比混凝土的力学性能的影响。试验结果表明,粗纤维的掺入能显著提升混凝土的劈拉强度,体积掺量为1.5vol%时,配比二混凝土的劈拉强度提高40%。评估了现有FRC劈拉强度预测公式对MFRC劈拉强度的预测效果,并基于试验结果提出了粗纤维混凝土劈拉强度预测公式。Fibre-reinforced polymer(FRP)composites have been widely used in many sectors,such as construction,transportation,energy,aerospace and sports,due to their advantages such as lightweightness,high strength,and excellent durability.A large amount of FRP wastes arises from the production process and at the end-of-life of FRP products,of which 95%is glass fibre reinforced polymer(GFRP)composites.Existing GFRP recycling methods are not economical owing to the low added value of glass fibres and significant degradation of glass fibre properties due to the recycling process.The authors’research team has previously proposed a mechanical method to process decommissioned wind turbine blades into macro fibres,which can then be used to produce macro fibre reinforced concrete(MFRC).This paper presents an experimental study in which the effects of fibre volume fraction,fibre thickness,fibre length,and concrete mix on the compression and splitting tensile properties of MFRC were investigated.The test results show that the splitting tensile strength of the concrete can be significantly enhanced by the addition of macro fibres,e.g.,by 40%when the macro fibre volume fraction in mix 2 concrete is 1.5vol%.The applicability of existing equations for predicting the splitting tensile strength of fibre reinforced concrete(FRC)to MFRC is evaluated,and a new equation for predicting the splitting tensile strength of MFRC is proposed based on the test data.

关 键 词：玻纤复材 固废 机械回收 粗纤维 纤维混凝土 

分 类 号：TU528.572[建筑科学—建筑技术科学] TB332[一般工业技术—材料科学与工程]