Effect of water-cement ratio on the electromagnetic shielding performance of C₃S paste cured long-term

• Autorzy: Liu Yunze , Li Yue , Jin Caiyun , Mu Jinlei

Identyfikatory

DOI

10.1007/s43452-023-00625-7

• Języki publikacji: EN

Abstrakty

EN

This paper investigated the electromagnetic shielding properties and the mechanisms of tricalcium silicate (C₃S) paste with three water-cement (W/C) ratios after long-term curing. The C₃S pastes with three W/C ratios were tested by XRD and other tests for the qualitative and quantitative analysis of the individual phases. The electromagnetic shielding properties and electromagnetic parameters of the specimens were obtained using the waveguide method. Finally, the microscopic mechanism of the variation of electromagnetic shielding properties of C₃S paste affected by the W/C ratio was dissected based on the individual phases. The results show that the volume fraction of pore, calcium silicate hydrate (C-S-H) gel, calcium hydroxide (CH), and calcite (CaCO₃) in the specimen increases with the rise of the W/C ratio, and the unhydrated C₃S decreases; the electromagnetic shielding of the paste specimen increases; the complex relative permittivity gradually increases. The mechanism of the W/C ratio affecting the electromagnetic shielding performance of C₃S paste is that, on the one hand, both the volume fraction of C-S-H and the relative permittivity in the solid phase, which have the greatest influence on the electromagnetic shielding performance, gradually increase with the increase of W/C ratio. On the other hand, as the W/C ratio increases, the volume fraction and area fraction of the mesopores in the specimen increase, which increases the internal loss of electromagnetic waves.

Słowa kluczowe

EN

C3S paste; water cement ratio; electromagnetic shielding; individual phases

PL

zaczyn cementowy; stosunek wodno cementowy; ekranowanie elektromagnetyczne

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 2
• Strony: art. no. e83, 2023
• Opis fizyczny: Bibliogr. 59 poz., rys., tab., wykr.

Twórcy

autor

Liu Yunze

• Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing Key Laboratory of Earthquake Engineering and Structural Retroft, Beijing University of Technology, Beijing 100124, China

autor

Li Yue

• Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing Key Laboratory of Earthquake Engineering and Structural Retroft, Beijing University of Technology, Beijing 100124, China

autor

Jin Caiyun

• Faculty of Science, Beijing University of Technology, Beijing 100124, China

autor

Mu Jinlei

• Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing Key Laboratory of Earthquake Engineering and Structural Retroft, Beijing University of Technology, Beijing 100124, China

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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).