Mechanical Processing of GFRP Waste into Large-Sized Pieces for Use in Concrete
Mechanical Processing of GFRP Waste into Large-Sized Pieces for Use in Concrete
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DOI：
10.3390/recycling3010008
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发表时间：
2018-02
期刊：
影响因子：
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通讯作者：
Ardavan Yazdanbakhsh;L. Bank;Yuan Tian
中科院分区：
文献类型：
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作者：
Ardavan Yazdanbakhsh;L. Bank;Yuan Tian
事实证明，回收玻璃纤维增强聚合物（GFRP）复合材料具有较高的机械性能以及对恶劣化学和热条件的高耐受性，因此具有挑战性。这项工作讨论了过去通过将 GFRP 废料切割成大尺寸（厘米级）碎片（而不是粉碎）来机械加工用于混凝土混合物的努力。这些部件可分为两大类：粗骨料和离散钢筋，此处称为“针”。所有研究的结果表明，使用 GFRP 粗骨料会导致混凝土的抗压强度和抗拉强度显着降低。然而，GFRP 针导致混凝土的能量吸收能力大幅增加。此外，如果玻璃纤维在针内纵向排列，这些元件可以显着增加混凝土的拉伸强度。将 GFRP 废料加工成针状材料比生产 GFRP 粗骨料所需的能源和时间更少。此外，与粉碎的 GFRP 废料（由破碎且分离的玻璃和树脂颗粒组成，充其量只能用作低质量填料）相比，GFRP 针是高强度复合元件。
Recycling glass fiber reinforced polymer (GFRP) composite materials has been proven to be challenging due to their high mechanical performance and high resistance to harsh chemical and thermal conditions. This work discusses the efforts made in the past to mechanically process GFRP waste materials by cutting them into large-sized (cm scale) pieces, as opposed to pulverization, for use in concrete mixtures. These pieces can be classified into two main categories—coarse aggregate and discrete reinforcement, here referred to as “needles.” The results from all the studies show that using GFRP coarse aggregate leads to significant reductions in the compressive strength and tensile strength of concrete. However, GFRP needles lead to sizable increases in the energy absorption capacity of concrete. In addition, if the glass fibers are longitudinally aligned within the needles, these elements can substantially increase the tensile strength of concrete. Processing GFRP waste into needles requires less energy and time than that for producing GFRP coarse aggregate. Also, compared to pulverized GFRP waste, which consists of broken and separate particles of glass and resin that at best can be used as low-quality fillers, GFRP needles are high strength composite elements.