Mechanical Performance of Cementitious Materials Reinforced with Polyethylene Fibers and Carbon Nanotubes

IF 4 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Fibers Pub Date : 2023-12-20 DOI:10.3390/fib12010001

Rashad R. AlAraj, Adil K. Tamimi, Noha M. Hassan, K. Fattah

引用次数: 0

Abstract

The cracking of cementitious materials due to their quasi-brittle behavior is a major concern leading to a loss in strength and durability. To limit crack growth, researchers have incorporated microfibers in concrete mixes. The objective of this study is to determine if nano-reinforcements can arrest cracks and enhance the material performance in comparison to microfibers. A total of 28 specimens were prepared to investigate and compare the effects of incorporating carbon nanotubes (CNTs) as a nano-reinforcement and polyethylene (PE) fibers at a macro-level and their combination. Compressive and flexural strengths were experimentally tested to assess the mechanical performance. The microstructure of the mortar samples was also examined using a scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDX). The ductility increased by almost 50% upon the addition of CNTs, while no significant enhancement was witnessed for the compressive strength. The flexural strength increased by 169% and the flexural strain by 389% through the addition of the combination of CNTs and PE fibers.

查看原文本刊更多论文

用聚乙烯纤维和碳纳米管增强的水泥基材料的力学性能

由于水泥基材料的准脆性，其开裂是导致强度和耐久性下降的一个主要问题。为了限制裂缝的增长，研究人员在混凝土混合物中加入了微纤维。本研究的目的是确定与微纤维相比，纳米增强材料能否阻止裂缝的产生并提高材料的性能。本研究共制备了 28 个试样，以研究和比较纳米碳管（CNT）作为纳米加固材料与聚乙烯（PE）纤维在宏观层面上的结合效果。实验测试了抗压和抗折强度，以评估其机械性能。此外，还使用扫描电子显微镜（SEM）和能量色散 X 射线光谱（EDX）对砂浆样品的微观结构进行了检测。添加碳纳米管后，延展性提高了近 50%，而抗压强度没有明显提高。添加碳纳米管和聚乙烯纤维后，抗弯强度提高了 169%，抗弯应变提高了 389%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Fibers Engineering-Civil and Structural Engineering

CiteScore

7.00

自引率

7.70%

发文量

审稿时长

11 weeks

期刊介绍： Fibers (ISSN 2079-6439) is a peer-reviewed scientific journal that publishes original articles, critical reviews, research notes and short communications on the materials science and all other empirical and theoretical studies of fibers, providing a forum for integrating fiber research across many disciplines. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files or software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. The following topics are relevant and within the scope of this journal: -textile fibers -natural fibers and biological microfibrils -metallic fibers -optic fibers -carbon fibers -silicon carbide fibers -fiberglass -mineral fibers -cellulose fibers -polymer fibers -microfibers, nanofibers and nanotubes -new processing methods for fibers -chemistry of fiber materials -physical properties of fibers -exposure to and toxicology of fibers -biokinetics of fibers -the diversity of fiber origins