Mechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers

There is increased interest in applying electromagnetic (EM) shielding to prevent EM interference, which destroys electronic circuits. The EM shielding’s performance is closely related to the electrical conductivity and can be improved by incorporating conductive materials. The weight of a structure...

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Autores principales:	Se-Hee Hong, Jin-Seok Choi, Tian-Feng Yuan, Young-Soo Yoon
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	lightweight aggregate steel fiber equilibrium density dry density compressive strength flexural strength 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/d01c952dba164029bf5a0f195a716d16
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spelling	oai:doaj.org-article:d01c952dba164029bf5a0f195a716d162021-11-11T18:04:35ZMechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers10.3390/ma142165051996-1944https://doaj.org/article/d01c952dba164029bf5a0f195a716d162021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6505https://doaj.org/toc/1996-1944There is increased interest in applying electromagnetic (EM) shielding to prevent EM interference, which destroys electronic circuits. The EM shielding’s performance is closely related to the electrical conductivity and can be improved by incorporating conductive materials. The weight of a structure can be reduced by incorporating lightweight aggregates and replacing the steel rebars with CFRP rebars. In this study, the effects of lightweight coarse aggregate and CFRP rebars on the mechanical and electrical characteristics of concrete were investigated, considering the steel fibers’ incorporation. The lightweight coarse aggregates decreased the density and strength of concrete and increased the electrical conductivity of the concrete, owing to its metallic contents. The steel fibers further increased the electrical conductivity of the lightweight aggregate concrete. These components improved the EM shielding performance, and the steel fibers showed the best performance by increasing shielding effectiveness by at least 23 dB. The CFRP rebars behaved similarly to steel rebars because of their carbon fiber content. When no steel fiber was mixed, the shielding effectiveness increased by approximately 2.8 times with reduced spacing of CFRP rebars. This study demonstrates that lightweight aggregate concrete reinforced with steel fibers exhibits superior mechanical and electrical characteristics for concrete and construction industries.Se-Hee HongJin-Seok ChoiTian-Feng YuanYoung-Soo YoonMDPI AGarticlelightweight aggregatesteel fiberequilibrium densitydry densitycompressive strengthflexural strengthTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6505, p 6505 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	lightweight aggregate steel fiber equilibrium density dry density compressive strength flexural strength 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	lightweight aggregate steel fiber equilibrium density dry density compressive strength flexural strength 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 Se-Hee Hong Jin-Seok Choi Tian-Feng Yuan Young-Soo Yoon Mechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers
description	There is increased interest in applying electromagnetic (EM) shielding to prevent EM interference, which destroys electronic circuits. The EM shielding’s performance is closely related to the electrical conductivity and can be improved by incorporating conductive materials. The weight of a structure can be reduced by incorporating lightweight aggregates and replacing the steel rebars with CFRP rebars. In this study, the effects of lightweight coarse aggregate and CFRP rebars on the mechanical and electrical characteristics of concrete were investigated, considering the steel fibers’ incorporation. The lightweight coarse aggregates decreased the density and strength of concrete and increased the electrical conductivity of the concrete, owing to its metallic contents. The steel fibers further increased the electrical conductivity of the lightweight aggregate concrete. These components improved the EM shielding performance, and the steel fibers showed the best performance by increasing shielding effectiveness by at least 23 dB. The CFRP rebars behaved similarly to steel rebars because of their carbon fiber content. When no steel fiber was mixed, the shielding effectiveness increased by approximately 2.8 times with reduced spacing of CFRP rebars. This study demonstrates that lightweight aggregate concrete reinforced with steel fibers exhibits superior mechanical and electrical characteristics for concrete and construction industries.
format	article
author	Se-Hee Hong Jin-Seok Choi Tian-Feng Yuan Young-Soo Yoon
author_facet	Se-Hee Hong Jin-Seok Choi Tian-Feng Yuan Young-Soo Yoon
author_sort	Se-Hee Hong
title	Mechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers
title_short	Mechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers
title_full	Mechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers
title_fullStr	Mechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers
title_full_unstemmed	Mechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers
title_sort	mechanical and electrical characteristics of lightweight aggregate concrete reinforced with steel fibers
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d01c952dba164029bf5a0f195a716d16
work_keys_str_mv	AT seheehong mechanicalandelectricalcharacteristicsoflightweightaggregateconcretereinforcedwithsteelfibers AT jinseokchoi mechanicalandelectricalcharacteristicsoflightweightaggregateconcretereinforcedwithsteelfibers AT tianfengyuan mechanicalandelectricalcharacteristicsoflightweightaggregateconcretereinforcedwithsteelfibers AT youngsooyoon mechanicalandelectricalcharacteristicsoflightweightaggregateconcretereinforcedwithsteelfibers
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Mechanical and Electrical Characteristics of Lightweight Aggregate Concrete Reinforced with Steel Fibers

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