Electromagnetic Wave Shielding Properties of Amorphous Metallic Fiber-Reinforced High-Strength Concrete Using Waveguides

In this study, high-strength concrete containing hooked-end steel or amorphous metallic fibers was fabricated, and the electrical conductivity and electromagnetic shielding effectiveness were evaluated after 28 and 208 days based on considerations of the influences of the moisture content. Amorphous...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Sangkyu Lee, Gyuyong Kim, Hongseop Kim, Minjae Son, Yaechan Lee, Yoonseon Choi, Jongmyung Woo, Jeongsoo Nam
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	electromagnetic wave amorphous metallic fiber shielding effectiveness waveguide Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/49f91ad5f59e41e1909b04de97e774de
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:49f91ad5f59e41e1909b04de97e774de
record_format	dspace
spelling	oai:doaj.org-article:49f91ad5f59e41e1909b04de97e774de2021-11-25T18:15:58ZElectromagnetic Wave Shielding Properties of Amorphous Metallic Fiber-Reinforced High-Strength Concrete Using Waveguides10.3390/ma142270521996-1944https://doaj.org/article/49f91ad5f59e41e1909b04de97e774de2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/7052https://doaj.org/toc/1996-1944In this study, high-strength concrete containing hooked-end steel or amorphous metallic fibers was fabricated, and the electrical conductivity and electromagnetic shielding effectiveness were evaluated after 28 and 208 days based on considerations of the influences of the moisture content. Amorphous metallic fibers, which have the same length and length/equivalent diameter ratio as hooked-end steel fibers, were favored for the formation of a conductive network because they can be added in large quantities owing to their low densities. These fibers have a large specific surface area as thin plates. The electromagnetic shielding effectiveness clearly improved as the electrical conductivity increased, and it can be expected that the shielding effectiveness will approach the saturation level when the fiber volume fraction of amorphous metallic fibers exceeds 0.5 vol.%. Meanwhile, it is necessary to reduce the amount of moisture to conservatively evaluate the electromagnetic shielding performance. In particular, when 0.5 vol.% of amorphous metallic fibers was added, a shielding effectiveness of >80 dB (based on a thickness of 300 mm) was achieved at a low moisture content after 208 days. Similar to the electrical conductivity, excellent shielding effectiveness can be expected from amorphous metallic fibers at low contents compared to that provided by hooked-end steel fibers.Sangkyu LeeGyuyong KimHongseop KimMinjae SonYaechan LeeYoonseon ChoiJongmyung WooJeongsoo NamMDPI AGarticleelectromagnetic waveamorphous metallic fibershielding effectivenesswaveguideTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 7052, p 7052 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electromagnetic wave amorphous metallic fiber shielding effectiveness waveguide Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	electromagnetic wave amorphous metallic fiber shielding effectiveness waveguide Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Sangkyu Lee Gyuyong Kim Hongseop Kim Minjae Son Yaechan Lee Yoonseon Choi Jongmyung Woo Jeongsoo Nam Electromagnetic Wave Shielding Properties of Amorphous Metallic Fiber-Reinforced High-Strength Concrete Using Waveguides
description	In this study, high-strength concrete containing hooked-end steel or amorphous metallic fibers was fabricated, and the electrical conductivity and electromagnetic shielding effectiveness were evaluated after 28 and 208 days based on considerations of the influences of the moisture content. Amorphous metallic fibers, which have the same length and length/equivalent diameter ratio as hooked-end steel fibers, were favored for the formation of a conductive network because they can be added in large quantities owing to their low densities. These fibers have a large specific surface area as thin plates. The electromagnetic shielding effectiveness clearly improved as the electrical conductivity increased, and it can be expected that the shielding effectiveness will approach the saturation level when the fiber volume fraction of amorphous metallic fibers exceeds 0.5 vol.%. Meanwhile, it is necessary to reduce the amount of moisture to conservatively evaluate the electromagnetic shielding performance. In particular, when 0.5 vol.% of amorphous metallic fibers was added, a shielding effectiveness of >80 dB (based on a thickness of 300 mm) was achieved at a low moisture content after 208 days. Similar to the electrical conductivity, excellent shielding effectiveness can be expected from amorphous metallic fibers at low contents compared to that provided by hooked-end steel fibers.
format	article
author	Sangkyu Lee Gyuyong Kim Hongseop Kim Minjae Son Yaechan Lee Yoonseon Choi Jongmyung Woo Jeongsoo Nam
author_facet	Sangkyu Lee Gyuyong Kim Hongseop Kim Minjae Son Yaechan Lee Yoonseon Choi Jongmyung Woo Jeongsoo Nam
author_sort	Sangkyu Lee
title	Electromagnetic Wave Shielding Properties of Amorphous Metallic Fiber-Reinforced High-Strength Concrete Using Waveguides
title_short	Electromagnetic Wave Shielding Properties of Amorphous Metallic Fiber-Reinforced High-Strength Concrete Using Waveguides
title_full	Electromagnetic Wave Shielding Properties of Amorphous Metallic Fiber-Reinforced High-Strength Concrete Using Waveguides
title_fullStr	Electromagnetic Wave Shielding Properties of Amorphous Metallic Fiber-Reinforced High-Strength Concrete Using Waveguides
title_full_unstemmed	Electromagnetic Wave Shielding Properties of Amorphous Metallic Fiber-Reinforced High-Strength Concrete Using Waveguides
title_sort	electromagnetic wave shielding properties of amorphous metallic fiber-reinforced high-strength concrete using waveguides
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/49f91ad5f59e41e1909b04de97e774de
work_keys_str_mv	AT sangkyulee electromagneticwaveshieldingpropertiesofamorphousmetallicfiberreinforcedhighstrengthconcreteusingwaveguides AT gyuyongkim electromagneticwaveshieldingpropertiesofamorphousmetallicfiberreinforcedhighstrengthconcreteusingwaveguides AT hongseopkim electromagneticwaveshieldingpropertiesofamorphousmetallicfiberreinforcedhighstrengthconcreteusingwaveguides AT minjaeson electromagneticwaveshieldingpropertiesofamorphousmetallicfiberreinforcedhighstrengthconcreteusingwaveguides AT yaechanlee electromagneticwaveshieldingpropertiesofamorphousmetallicfiberreinforcedhighstrengthconcreteusingwaveguides AT yoonseonchoi electromagneticwaveshieldingpropertiesofamorphousmetallicfiberreinforcedhighstrengthconcreteusingwaveguides AT jongmyungwoo electromagneticwaveshieldingpropertiesofamorphousmetallicfiberreinforcedhighstrengthconcreteusingwaveguides AT jeongsoonam electromagneticwaveshieldingpropertiesofamorphousmetallicfiberreinforcedhighstrengthconcreteusingwaveguides
_version_	1718411377471651840

Electromagnetic Wave Shielding Properties of Amorphous Metallic Fiber-Reinforced High-Strength Concrete Using Waveguides

Ejemplares similares