Effect of macro synthetic fiber (MSF) on the behavior of conventional concrete and the concrete containing e-waste aggregates

IF 3.9 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Zeeshan Ahmad, Muhammad Irshad Qureshi, Farhan Ahmad, Mohamed Hechmi El Ouni, Muhammad Zubair Asghar, Nejib Ghazouani
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Abstract

The appropriate disposal of plastic waste remains a persistent challenge for scientists and researchers. Several methods have been developed for managing plastic waste, including its use in concrete production. However, utilizing electronic waste (e-waste) materials in concrete presents challenges, particularly in reducing concrete strength. To address this, the current research incorporates macro synthetic fibers (MSF) into both conventional concrete and concrete containing e-waste aggregates. In this study, shredded e-waste coarse aggregates (ECA) partially replace 30% of natural coarse aggregates (NCA) by volume. Various properties of both conventional and ECA-modified concrete are evaluated, including mechanical characteristics, durability performance, and microstructural developments. One-way analysis of variance (ANOVA) is also performed to determine the significance of the mechanical and durability properties of mixes having MSF. The results show that concrete with MSF significantly outperforms concrete without it. Specifically, incorporating 0.75% MSF (by volume) enhances splitting tensile strength by 152%, flexural strength by 98%, and compressive strength by 38%. However, an inverse relationship is observed between MSF dosage and the permeability-based durability of fiber-reinforced concrete. Scanning electron microscopy (SEM) reveals that adding ECA weakens the internal concrete matrix, but optimal MSF inclusion improves the microstructure. This study highlights the importance of incorporating e-waste materials into concrete and demonstrates that appropriate fiber reinforcement (MSF) is crucial for addressing strength challenges while promoting sustainability and practicality.

宏合成纤维(MSF)对普通混凝土和含电子垃圾骨料混凝土性能的影响
对科学家和研究人员来说,适当处理塑料废物仍然是一个持久的挑战。已经开发了几种管理塑料废物的方法,包括在混凝土生产中的使用。然而,在混凝土中利用电子废物(电子废物)材料提出了挑战,特别是在降低混凝土强度方面。为了解决这个问题,目前的研究将宏观合成纤维(MSF)纳入传统混凝土和含有电子垃圾骨料的混凝土中。在这项研究中,切碎的电子垃圾粗骨料(ECA)部分取代了30%的天然粗骨料(NCA)的体积。评估了传统和eca改性混凝土的各种性能,包括机械特性、耐久性性能和微观结构发展。还进行了单向方差分析(ANOVA),以确定具有MSF的混合料的机械和耐久性性能的重要性。结果表明,有MSF的混凝土性能明显优于无MSF的混凝土。具体来说,加入0.75% MSF(按体积计)可使劈裂抗拉强度提高152%,弯曲强度提高98%,抗压强度提高38%。然而,MSF掺量与纤维增强混凝土的透水耐久性呈反比关系。扫描电镜(SEM)结果表明,加入ECA会削弱混凝土内部基体,而最佳的MSF夹杂物则会改善混凝土的微观结构。这项研究强调了将电子废物材料纳入混凝土的重要性,并证明了适当的纤维增强(MSF)对于解决强度挑战,同时促进可持续性和实用性至关重要。
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来源期刊
Materials and Structures
Materials and Structures 工程技术-材料科学:综合
CiteScore
6.40
自引率
7.90%
发文量
222
审稿时长
5.9 months
期刊介绍: Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.
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