Abstract
Electromagnetic interference shielding has attracted attention in design processes for reducing radiation to protect humans or equipment. Traditional shielding constitutes adding strengthening, conductive paints, conductive fibers, or grids to non-damaged structures. Few studies have considered using hybrid reinforcement methods for shielding effectiveness or examined the relationship between damaged areas and shielding effectiveness. We prepared a reinforced concrete (RC) wall with different steel fiber contents, metallic grid/mesh reinforcement, and hybrid reinforcement and created damage areas via impact load. Compared with 300 mm thick RC and single-type reinforced specimens, the hybrid reinforced specimens had an approximately 25.9 times and 2.4 times higher shielding effectiveness, respectively. Specimens reinforced with metallic mesh exhibited less than 150% of free space area ratio and more than 30 dB shielding effectiveness. The hybrid metallic mesh and facultative metallic grid achieved over 40 dB. Hybrid reinforced specimens exhibited improved impact resistance and great shielding effectiveness in damaged conditions.
| Original language | English |
|---|---|
| Article number | 104148 |
| Journal | Cement and Concrete Composites |
| Volume | 122 |
| DOIs | |
| Publication status | Published - 2021 Sept |
Bibliographical note
Funding Information:This research was supported by a grant ( 19SCIP-B146646-02 ) from Construction Technology Research Project funded by the Ministry of Land, Infrastructure and Transport of Korea government , and Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education ( 2020R1A6A1A03045059 ).
Publisher Copyright:
© 2021
Keywords
- Damage area ratio
- Electromagnetic shielding
- Impact resistance
- Metal grid
ASJC Scopus subject areas
- Building and Construction
- Materials Science(all)