冲击载荷和辐射作用下稻草纤维对硬化混凝土性能的影响

IF 4 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Fibers Pub Date : 2023-05-08 DOI:10.3390/fib11050042
M. Mahdy, S. Mahfouz, A. Tawfic, Mohamed A. E. M. Ali
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引用次数: 1

摘要

混凝土是现代社会必不可少的人造建筑材料。然而,由于混凝土结构具有脆性特性,当受到动态载荷时,其使用寿命有限。由于有害的辐射和动力效应,核排放和爆炸威胁着人类的生命和结构的安全。由于农业揭示了大量需要处理的副产品,因此在许多部门使用这些副产品对当代研究来说是一个挑战。处理此类废物的最重要领域之一是建筑,尤其是混凝土。本研究选择利用农业副产品稻草纤维来取代人工纤维在混凝土生产中的使用,并呈现出一种具有增强的静态/动态性能和伽马屏蔽特性的环保型潜在竞争者。本研究中提出了不同的混凝土混合物来评估上述特性。设计的混凝土混合物为稻草纤维体积分数变化为0%、0.25%、0.5%和0.75%的传统混凝土。所需的静态性能为抗压强度、劈拉强度和弯曲强度。此外,本研究还采用落锤冲击试验来研究RSF钢筋混凝土的抗冲击性能。最后,利用线性衰减试验对生产的混凝土的辐射屏蔽特性进行了测试。结果表明,在混凝土生产中添加RSF的农业副产品,抗压强度略有提高,最高可达7.0%,而拉伸和弯曲性能分别显著提高,最高达17.1%和25.8%。此外,由于添加了RSF,混凝土的抗冲击性能提高了48.6%。此外,它使混凝土的伽马屏蔽能力提高了7.9%。本研究的成果为RSF钢筋混凝土在各种非传统应用中的应用铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance of Rice Straw Fibers on Hardened Concrete Properties under Effect of Impact Load and Gamma Radiation
Concrete is an essential artificial building material in modern society. However, because concrete structures have brittle characteristics, they have a limited service life when subjected to dynamic loads. Nuclear emissions and explosions threaten human lives and structures’ safety due to harmful radiation and dynamic effects. Since agriculture has revealed a large amount of by-products that require disposal, the use of such by-products in many sectors is a challenge for contemporary studies. One of the most important areas for the disposal of such waste is construction, and concrete in particular. The utilization of the agricultural by-product rice straw fiber was chosen in this study to replace the usage of artificial fibers in concrete production and present an eco-friendly prospective contender with enhanced static/dynamic performance and gamma shielding characteristics. Different concrete mixtures were proposed in this study to evaluate the aforementioned characteristics. The designed concrete mixtures were conventional concrete with variations in the volume fraction of rice straw fibers (RSF) of 0%, 0.25%, 0.5%, and 0.75%. The desired static properties were compressive strength, splitting tensile strength, and flexural strength. Additionally, the drop weight impact test was used in this study to investigate the impact resistance of RSF-reinforced concrete. Finally, the radiation-shielding characteristic of the produced concrete was tested using the linear attenuation test. The results show that adding agricultural by-products of RSF in concrete production slightly enhanced the compressive strength by up to 7.0%, while it significantly improved the tensile and flexural properties by up to 17.1% and 25.8%, respectively. Additionally, a superior impact resistance of concrete was achieved by up to 48.6% owing to RSF addition. Furthermore, it enhanced the gamma shielding capability of concrete by up to 7.9%. The achievements in this study pave the way for utilizing RSF-reinforced concrete in various non-traditional applications.
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来源期刊
Fibers
Fibers Engineering-Civil and Structural Engineering
CiteScore
7.00
自引率
7.70%
发文量
92
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
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