Calculation of Effective Electrophysical Properties of Asphalt Concrete Layer in Order to Assess Its Qualitative Composition

Abstract

The development of a non-contact technique for the road surface quality control without extracting samples for analysis is an extremely urgent task. The paper proposes to evaluate the influence of the granulometric composition of the road surface sample on its effective electromagnetic properties. This will make it possible to assess the thickness and actual content of the paved surface according to the data of non-contact measurements. It will be possible to obtain the functional relationships between the measured effective values (dielectric permeability and/or electrical resistance) and the qualitative composition of the numerically studied samples of the road surface, considered at this stage as a homogeneous medium with characteristic effective electromagnetic properties. Mathematical modeling of the samples considering their heterogeneous internal structure is performed by the vector method of finite elements. The effective properties of the medium are determined by direct modeling in a three-dimensional calculation domain approximated by its internal geometry and physical properties to the asphalt concrete sample.