Submicron carbon filament cement-matrix composites for electromagnetic interference shielding

Abstract Carbon filaments of diameter 0.1 mm were found to be a much more effective additive than conventional carbon fibers of diameter 10 mm in providing cement pastes capable of electromagnetic interference shielding. With 0.54 vol.% filaments and a shield thickness of 4 mm, a shielding effectiveness of 30 dB was attained at 1–2 GHz. However, the filaments were less effective than the fibers for reinforcing and for providing strain sensing cement-matrix composites.

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