Effective utilization of recycled fine aggregate powder as reinforcement particles in polyethylene composite
Effective utilization of recycled fine aggregate powder as reinforcement particles in polyethylene composite
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DOI：
10.1177/0967391120951381
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发表时间：
2020-08
影响因子：
2.1
通讯作者：
Y. Kanda;M. Abass
中科院分区：
文献类型：
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作者：
Y. Kanda;M. Abass
从环境保护和延长废混凝土最终处理场的使用寿命的角度来看，有效回收废混凝土是可取的。通过碾磨废混凝土得到再生细骨料粉末（RFAP），本文尝试将RFAP作为聚乙烯（PE）复合材料的增强颗粒。将PE粉末与RFAP共混，采用压缩成型法制备复合材料。结果表明，随着RFAP含量的增加，复合材料的抗弯强度和抗弯模量均有所提高。复合材料中的RFAP弥散状态呈蜂窝状，从三点弯曲试验后的试样侧面观察，可以明显看出裂纹扩展进入复合材料的RFAP部分，即PE颗粒之间。然后，我们对复合材料进行了弹性应力分析，为了确定RFAP增强行为，采用基于均匀化方法的有限元分析。结果表明，随着RFAP含量的增加，Mises应力降低，证实了RFAP作为pe基复合材料的增强颗粒具有潜在的作用。
Effective waste concrete recycling is desirable from the viewpoints of environmental protection and extending the working lives of waste concrete final disposal sites. Recycled fine aggregate powders (RFAP) were obtained by milling waste concrete, and in this paper, we attempted to use RFAP as reinforcement particles in a polyethylene (PE) composite material. The PE powder and RFAP were blended together, and composites were fabricated using compression molding. Our results showed that the flexural strength and flexural modulus of the created composites improved with increased RFAP content. The RFAP dispersion state was honeycomb-like in the composite material, and from inspecting the specimen side view after three-point bending tests, it was apparent that crack propagation proceeded into the RFAP part of the composite, between PE particles. We then performed elastic stress analysis on the composites, in order to define the RFAP reinforcing behavior, using finite element analysis based on the homogenization method. As a result, it was revealed that the Mises stress decreased with increased RFAP content, confirming that there is a potential role for RFAP as reinforcement particles in PE-based composites.