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A. Mocnik1,2, M. Dossi1, E. Forte1,2, R. Zambrini2, A. Zamariolo2, M. Pipan1,2
1 Department of Mathematics and Geosciences, University of Trieste, Italy 2 Esplora srl, academic spin-off of the University of Trieste, Italy

Introduction. In this work we present three examples of application of Ground Penetrating Radar (GPR) method for pavement thickness evaluation and stratigraphic analysis using R.Ex. (Road Explorer), a new system developed by Esplora srl, an academic spin-off of the University of Trieste, in collaboration with the geophysical group of the Department of Mathematics and Geosciences of the same University.
The implementation of this GPR system aims to obtain information that are crucial for the good management and planning of road maintenance, which is fundamental to prevent and minimize the risks to which light and heavy vehicles may be exposed during transit, and ensure the maximum safety for passengers. Nowadays, for testing of pavement of new road infrastructures, direct measurements such as drill cores are performed. Usually drillings reach a depth of about one meter from the road surface and its lateral spacing is variable, basing on the importance of the road and its constructive characteristics, but typically it exceeds some hundreds of meters.
These surveys are primarily aimed at:
• evaluating the thicknesses and local thickness variations;
• collecting all the elements for the definition of the mechanical properties of the road
• identifying voids, fractures or local defects;
• evaluating the correspondence between the design specifications and the actual work. Similar surveys are also carried out even after the realization of significant works of
maintenance of existing infrastructures or where particular problems have been reported on specific segments of a road infrastructure…

Mocnik et Al., 2015