| Summary: | The Žilina airport was after almost 50 years of use measured by non-invasive
methods including GPR and Profilograph GE in order to investigate the quality of the
runway pavement at the chosen spots. Since it was just a pilot action, a sample of survey
was carried out. The testing spots were placed where the geologic drill core J02 have
been drilled out. The measurements performed by Profilograph GE were used to verify
the quality of the pavement surface in term longitudinal unevenness by means of index IRI
and C. The GPR survey was performed in 3D geometry, hence in the x- and y-direction.
A horn type antenna with central frequency of 2 GHz was used on the test field in order
to verify the thicknesses of pavement construction layers. Here, the result of a 3D survey
is presented. The investigation confirms two sub-horizontal construction layers of the
runway pavement. In some areas the GPR interpretation was not possible due to the
signal attenuation. This significant signal attenuation is found mainly in the areas where
the linear cracks are situated.
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