Electromagnetic shielding properties of carbon fibre reinforced cementitious composites

Document Type

Journal Article

Publication Title

Construction and Building Materials

ISSN

09500618

Volume

260

Publisher

Elsevier

School

School of Engineering

RAS ID

32134

Funders

Australian Research Council Discovery Project

Grant Number

ARC Number : DP180104035

Grant Link

http://purl.org/au-research/grants/arc/DP180104035

Comments

Wanasinghe, D., Aslani, F., & Ma, G. (2020). Electromagnetic shielding properties of carbon fibre reinforced cementitious composites. Construction and Building Materials, 260, article 120439. https://doi.org/10.1016/j.conbuildmat.2020.120439

Abstract

© 2020 Elsevier Ltd The need for construction materials with high electromagnetic (EM) shielding properties is growing globally due to the rapid development of electronic devices. This study has aimed at fabricating a cement-based composite that could be developed for electromagnetic shielding applications within the industry. To impart EM shielding properties, unsized carbon fibres with lengths of 3 mm, 6 mm, and 12 mm and desized carbon fibres with lengths of 6 mm and 12 mm were mixed to a control mix. Different weight fractions of 0.1%, 0.3%, 0.5%, and 0.7% of carbon fibres of each type were used in the fabrication of specimens. Each mix was subjected to mechanical, electrical conductivity, electromagnetic interference shielding, and scanning electron microscope analyses for characterisation. Results show that the addition of carbon fibres has a significant improvement in flexural, electrical conductivity, and electromagnetic interference shielding properties. The mix with the highest electrical conductivity was the one with unsized 12 mm carbon fibres with a weight fraction of 0.7%. The same mix showed the best electromagnetic interference shielding properties, which was about 40–60 dB within 300 MHz to 1.5 GHz frequency range. Comparison of obtained results with mixes reported in the literature containing carbon within a cement matrix showed that electromagnetic interference shielding performance of the best mix in this study exceeded performance reported in the literature for the same frequency range.

DOI

10.1016/j.conbuildmat.2020.120439

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