The study is to discuss the electromagnetic shielding effectiveness on iron adding the iron powder. And it is to analyze the effect to change the material and percentage of concrete for the electromagnetic shielding effectiveness. In the results, when the concrete test models with iron powder is single piece, we know that the iron powders in the concrete are more, and surface resistivity is lower and the electromagnetic shielding effectiveness is well. And when the concrete test models with iron powder are combined three pieces, the electromagnetic shielding effectiveness is much better.
