Shielding properties of conductive concrete against transient electromagnetic disturbances

This paper studies the shielding properties of conductive concrete, when exposed to a transient electromagnetic pulse in the form of a uniform plane wave. The conductive concrete under investigation is a cementious composite having a low volume concentration of steel fibres included in the cement mix. It is shown that the real and imaginary parts of the complex relative permittivity and the conductivity of the conductive concrete are higher than those obtained from an undoped concrete up to approximately 2 GHz. However, it is equally shown for the case investigated that the increases in the real part of the complex relative permittivity and in the conductivity do not translate into significant increases in the ability of conductive concrete to attenuate electromagnetic disturbances.