Resonant measurement method for microwave characterization of bituminous mixtures

Abstract

In this paper a new type of microwave resonant technique exploiting a cylindrical resonator for the characterization of heterogeneous bituminous mixtures is presented. The extraction of dielectric properties is undertaken with the aid of electromagnetic modelling with a finite-difference time-domain method, which is used to create a look-up table of a resonant frequency and a quality factor as a function of permittivity and loss tangent.