| Title |
The UHF Wave Shielding Effectiveness of Mortar with Conductive Inclusions |
| Authors |
Kim, Young-Jun ; Yi, Chongku |
| DOI |
http://dx.doi.org/10.5659/JAIK_SC.2015.31.4.103 |
| Keywords |
Electromagnetic wave ; Shielding effectiveness ; Mortar ; Metal fiber ; Copper slag |
| Abstract |
In this study, the electromagnetic shielding properties of mortar with various conductive inclusions were investigated to develop a cement composite that can be used as an effective barrier against unwanted electromagnetic waves in buildings. The mortars of moderate strength (W/C ratio of 40%) were prepared by replacing fine aggregates with metal fibers (0.3%, 0.5%) and copper slag (20%, 40%), and their electromagnetic shielding effectiveness were determined according to ASTM D 4935. The results showed that the shielding effectiveness is positively related with the increase in the wave frequency, and the volume of the conductive inclusions. In particular, it was also found that the effectiveness can be enhanced by hybridizing the two inclusion types. |