Mechanical Property and Electromagnetic Interference Shielding Effectiveness of Mortar Produced with Radiation-Proof Cloths
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 3
Abstract
This paper explores a new way to recycle wasted radiation-proof cloths and produced a cost-effective material for electromagnetic shielding. Chopped fiber (CF), produced from radiation-proof cloths made from copper-plated Dacron (CPD) and silver-plated Dacron (SPD), is used as the conductive material to manufacture electromagnetic interference (EMI)-shielding mortars. The electrical resistivity and strength of CF mortar is investigated. The effects of CF content, CF length, and sample thickness on the shielding effectiveness (SE) in the frequency range 0.3–3,000 MHz is studied. Test results show that the electrical resistivity decreases rapidly with the increase of CF content. The addition of CPD could improve both compressive and flexural strength of mortar. The compressive strength increases and the flexure strength decreases with the addition of SPD. The maximum compressive strength reaches 40.9 and 36.5 MPa for CPD and SPD mortars, respectively. The SE curves have small difference for these two types of mortars. The increase of CF content, CF length, and sample thickness could all enhance the SE, but to a different extent. For this type of mortar, the maximum peak value of 47.7 dB is obtained at a frequency of 2,470 MHz with a thickness of 30 mm.
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Acknowledgments
Sincere gratitude is given for the financial support provided by National Natural Science Foundation of China (51478251) and Key Research and Development Program of Shandong Province China (2015GSF122009). The authors also thank the research laboratory in the School of Civil Engineering, Shandong University and Shanghai Institute of Measurement for experimental implementation.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 3 • March 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 4, 2017
Accepted: Sep 20, 2017
Published online: Jan 11, 2018
Published in print: Mar 1, 2018
Discussion open until: Jun 11, 2018
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