Electromagnetic interference shielding effectiveness of multi-cracked strain-hardening cementitious composites (SHCC)

• Autorzy: Kim Soonho , Jang Yun Sik , Oh Taegeun , Lee Seung Kyun , Yoo Doo-Yeol

Identyfikatory

DOI

10.1007/s43452-023-00714-7

• Języki publikacji: EN

Abstrakty

EN

With the rapid increase in the use of wireless electronic devices, electromagnetic pollution has been recognized as a serious threat. There has been an increasing demand for the use of cement composites as electromagnetic shielding materials. Thus, this study investigated the advantages of adding a small dosage of carbon fibers to enhance the mechanical and electrical properties of strain-hardening cementitious composites (SHCCs) containing steel fibers. In addition, the effect of microcrack formation on the electromagnetic interference (EMI) shielding effectiveness of the SHCCs was analyzed. For this purpose, four different residual tensile strains were applied in preloading tests in the range of 0.015–0.1%. The test results suggested that the tensile performance of the SHCCs was improved by adding 0.2 vol% carbon fibers. Moreover, the rate of increase of the energy absorption capacity was higher (50%) than those of the tensile strength and strain capacity. The electrical conductivity and EMI shielding effectiveness of the SHCCs were noticeably increased by the addition of carbon fibers. The highest shielding effectiveness of 45.6 dB, at 1 GHz, was achieved for the SHCC containing 2% steel fibers and 0.2% carbon fibers, which was approximately 6% higher than that of the corresponding plain SHCC with only steel fibers. An approximately 44–47% lower shielding effectiveness was observed with the formation of through microcracks; however, the number of cracks and the residual tensile strain did not significantly influence the shielding effectiveness. This study can be a basis for evaluating EMI shielding effectiveness of damaged structures.

Słowa kluczowe

EN

fiber reinforced cementitious composites; multifunctional cementitious composites; steel fiber; carbon fiber; tensile performance; microcracks; electrical conductivity

PL

kompozyt cementowy; włókno stalowe; włókno węglowe; mikropęknięcie; wytrzymałość na rozciąganie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 3
• Strony: art. no. e179, 2023
• Opis fizyczny: Bibliogr. 46 poz., rys., wykr.

Twórcy

autor

Kim Soonho

• Department of Architectural Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea

autor

Jang Yun Sik

• Engineering Support Team, Construction Management Office, Housing & Building Business Division, DL E&C Co., Ltd., Jongno-gu, Seoul 03152, Republic of Korea

autor

Oh Taegeun

• Department of Architectural Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea

autor

Lee Seung Kyun

• Department of Architectural Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea

autor

Yoo Doo-Yeol

• Department of Architecture and Architectural Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea

• https://orcid.org/0000-0003-2814-5482

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)