GPR Application for Non-Rigid Road Pavement Condition Assessment

Dmitry O. Batrakov, Mariya S Antyufeyeva, Angelika G. Batrakova

Abstract


To obtain and further process the data obtained as a result of modelling and field experiments, modern UWB georadars were used. Also involved are methods of computer modelling and software developed by the authors. The analysis of the results obtained is based on mathematical models that have proven their effectiveness and is time-tested. Let's emphasize that the most important problem arising in assessing the quality of highways with non-rigid pavements arises from the fact that in these problems the dielectric constant of the medium is not only unknown a priori, but also varies from layer to layer. Previously, the authors proposed a scheme for the layer-by-layer determination of the values of the relative permittivity and then - the subsequent determination of the thickness of each layer, starting from the top layer and ending with the base. It is important that the paper presents the results of experiments actually carried out by the authors with various GPRs, which not only have different values of the central frequency, but also have significant design differences. In addition, the results of processing real data using the software developed by the authors are presented. As a result, an improved method of signal calibration has been proposed, which makes it possible to increase the reliability of assessing the thickness of road surfaces, as well as other objects.

Keywords:

Asphalt; Dielectric materials; Ground penetratingradar; Impulse testing; Nondestructive testing; Ultra-wideband technology

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