Effect of fiber hybridization on the electromagnetic shielding of UHPFRCC panel
Interest in electromagnetic shielding of cement-based materials is increasing to protect human health and electronic equipment from electromagnetic interference (EMI). EMI shielding effectiveness of cement-based materials can be reduced by cracking, and thus cracking behavior is a major factor influ...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424004265 |
| _version_ | 1797247786281861120 |
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| author | Ho-Jin Lee Jin-Seok Choi Doo-Yeol Yoo Young-Soo Yoon |
| author_facet | Ho-Jin Lee Jin-Seok Choi Doo-Yeol Yoo Young-Soo Yoon |
| author_sort | Ho-Jin Lee |
| collection | DOAJ |
| description | Interest in electromagnetic shielding of cement-based materials is increasing to protect human health and electronic equipment from electromagnetic interference (EMI). EMI shielding effectiveness of cement-based materials can be reduced by cracking, and thus cracking behavior is a major factor influencing EMI shielding effectiveness reduction of cracked cementitious composites. In this study, the effects of hybridization of fibers on the cracking behavior and EMI shielding effectiveness of non-cracked and cracked ultra-high-performance fiber-reinforced cementitious composite (UHPFRCC) were investigated. UHPFRCC containing 1.5 vol% long steel fibers was considered as a control variable, and substitution with 0.5 vol% short steel fibers, PE fibers, and carbon fibers was considered as experimental variables. Compressive strength, density, direct tensile behavior, electrical conductivity, and capacitance tests were conducted. After that, crack length, width, area, and EMI shielding effectiveness of panels that were cracked by step-by-step loading were measured. According to the test results, the effect of short steel fiber substitution was insignificant. PE fibers significantly improved tensile strain performance, but it decreased EMI shielding effectiveness when the thickness of the panel decreased. On the other hand, carbon fiber substitution decreased mechanical performance and electrical conductivity due to dispersion problems, but it improved EMI shielding effectiveness at 1 GHz by 30.0–62.9% by dielectric polarization. The total crack length at each displacement level increased logarithmically with the increase in normalized toughness, and carbon fiber substitution showed the lowest crack dispersion capacity. However, carbon fiber substitution has been shown to alleviate the degree of deterioration of EMI shielding effectiveness after cracking. |
| first_indexed | 2024-03-07T22:00:50Z |
| format | Article |
| id | doaj.art-1d773001e9034613ac98da45ea8a31cb |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:04:13Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-1d773001e9034613ac98da45ea8a31cb2024-03-24T06:58:26ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012940044017Effect of fiber hybridization on the electromagnetic shielding of UHPFRCC panelHo-Jin Lee0Jin-Seok Choi1Doo-Yeol Yoo2Young-Soo Yoon3School of Civil, Environmental and Architectural Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of KoreaSchool of Civil, Environmental and Architectural Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of KoreaDepartment of Architecture and Architectural Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea; Corresponding author.School of Civil, Environmental and Architectural Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea; Corresponding author.Interest in electromagnetic shielding of cement-based materials is increasing to protect human health and electronic equipment from electromagnetic interference (EMI). EMI shielding effectiveness of cement-based materials can be reduced by cracking, and thus cracking behavior is a major factor influencing EMI shielding effectiveness reduction of cracked cementitious composites. In this study, the effects of hybridization of fibers on the cracking behavior and EMI shielding effectiveness of non-cracked and cracked ultra-high-performance fiber-reinforced cementitious composite (UHPFRCC) were investigated. UHPFRCC containing 1.5 vol% long steel fibers was considered as a control variable, and substitution with 0.5 vol% short steel fibers, PE fibers, and carbon fibers was considered as experimental variables. Compressive strength, density, direct tensile behavior, electrical conductivity, and capacitance tests were conducted. After that, crack length, width, area, and EMI shielding effectiveness of panels that were cracked by step-by-step loading were measured. According to the test results, the effect of short steel fiber substitution was insignificant. PE fibers significantly improved tensile strain performance, but it decreased EMI shielding effectiveness when the thickness of the panel decreased. On the other hand, carbon fiber substitution decreased mechanical performance and electrical conductivity due to dispersion problems, but it improved EMI shielding effectiveness at 1 GHz by 30.0–62.9% by dielectric polarization. The total crack length at each displacement level increased logarithmically with the increase in normalized toughness, and carbon fiber substitution showed the lowest crack dispersion capacity. However, carbon fiber substitution has been shown to alleviate the degree of deterioration of EMI shielding effectiveness after cracking.http://www.sciencedirect.com/science/article/pii/S2238785424004265Ultra-high-performance fiber-reinforced cementitious compositeElectromagnetic interference shieldingCracking behaviorHybrid fiber reinforcementCarbon fiberCapacitance |
| spellingShingle | Ho-Jin Lee Jin-Seok Choi Doo-Yeol Yoo Young-Soo Yoon Effect of fiber hybridization on the electromagnetic shielding of UHPFRCC panel Journal of Materials Research and Technology Ultra-high-performance fiber-reinforced cementitious composite Electromagnetic interference shielding Cracking behavior Hybrid fiber reinforcement Carbon fiber Capacitance |
| title | Effect of fiber hybridization on the electromagnetic shielding of UHPFRCC panel |
| title_full | Effect of fiber hybridization on the electromagnetic shielding of UHPFRCC panel |
| title_fullStr | Effect of fiber hybridization on the electromagnetic shielding of UHPFRCC panel |
| title_full_unstemmed | Effect of fiber hybridization on the electromagnetic shielding of UHPFRCC panel |
| title_short | Effect of fiber hybridization on the electromagnetic shielding of UHPFRCC panel |
| title_sort | effect of fiber hybridization on the electromagnetic shielding of uhpfrcc panel |
| topic | Ultra-high-performance fiber-reinforced cementitious composite Electromagnetic interference shielding Cracking behavior Hybrid fiber reinforcement Carbon fiber Capacitance |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424004265 |
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