Analysis of shielding effectiveness of conductive cement-based materials in HEMP environment

The shielding effectiveness of conductive cement-based materials to HEMP is analyzed using theoretical and FDTD method when the materials' conductivity range 10
^-3
~10
²
S/m. The effect of materials' conductivity on shielding effectiveness to HEMP is obtained and the threshold of materials' conductivity is achieved when their shielding effectiveness increases suddenly. Finally, the experimental shielding effectiveness of three shielding rooms built of different conductive cement-based materials is measured.