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基于统计实验研究的再生PET纤维混凝土力学性能优化

Mechanical Optimization of Concrete with Recycled PET Fibres Based on a Statistical-Experimental Study.

作者信息

Meza Alejandro, Pujadas Pablo, Meza Laura Montserrat, Pardo-Bosch Francesc, López-Carreño Rubén D

机构信息

Department of Mechanical Engineering, Tecnológico Nacional de México/IT Aguascalientes, Av. Adolfo López Mateos 1801, Aguascalientes 20256, Mexico.

Department of Project and Construction Engineering, Universitat Politècnica de Catalunya (UPC-Barcelona Tech), Escola Tècnica Superior d'Enginyers Industrials de Barcelona (ETSEIB), Av. Diagonal, 647, 08028 Barcelona, Spain.

出版信息

Materials (Basel). 2021 Jan 6;14(2):240. doi: 10.3390/ma14020240.

DOI:10.3390/ma14020240
PMID:33418955
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7825144/
Abstract

Discarded polyethylene terephthalate (PET) bottles have damaged our ecosystem. Problems of marine fauna conservation and land fertility have been related to the disposal of these materials. Recycled fibre is an opportunity to reduce the levels of waste in the world and increase the mechanical performance of the concrete. PET as concrete reinforcement has demonstrated ductility and post-cracking strength. However, its performance could be optimized. This study considers a statistical-experimental analysis to evaluate recycled PET fibre reinforced concrete with various fibre dose and aspect ratio. 120 samples were experimented under workability, compressive, flexural, and splitting tensile tests. The results pointed out that the fibre dose has more influence on the responses than its fibre aspect ratio, with statistical relation on the tensional toughness, equivalent flexural strength ratio, volumetric weight, and the number of fibres. Moreover, the fibre aspect ratio has a statistical impact on the tensional toughness. In general, the data indicates that the optimal recycled PET fibre reinforced concrete generates a superior performance than control samples, with an improvement similar to those reinforced with virgin fibres.

摘要

废弃的聚对苯二甲酸乙二酯（PET）瓶已经对我们的生态系统造成了破坏。海洋动物保护和土地肥力问题与这些材料的处置有关。回收纤维是减少全球垃圾水平并提高混凝土力学性能的一个契机。PET作为混凝土增强材料已展现出延展性和开裂后强度。然而，其性能仍可优化。本研究采用统计实验分析方法，以评估不同纤维剂量和长径比的回收PET纤维增强混凝土。对120个样本进行了工作性、抗压、抗弯和劈裂抗拉试验。结果表明，纤维剂量对各项响应的影响比对其长径比的影响更大，在拉伸韧性、等效抗弯强度比、体积重量和纤维数量方面存在统计关系。此外，纤维长径比对拉伸韧性有统计影响。总体而言，数据表明，最佳的回收PET纤维增强混凝土比对照样本具有更优异的性能，其改善程度与原生纤维增强的混凝土类似。

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