Methodologies for the Use of Ground-Penetrating Radar in Road Condition Surveys - ME 91/16

This publication is aimed at the users of Ground-Penetrating Radar (GPR) in pavement condition surveys. It makes recommendations for the choice of GPR equipment as well as for the collecting, processing and interpreting of data.

GPR is a tool for non-destructive geophysical investigation based on the propagation and reflection of electromagnetic waves (20 MHz to 3 GHz). It reacts to electromagnetic variations in a medium (permittivity, conductivity and magnetic sensitivity).  Measurements are generally carried out by moving the antenna over the surface (either in contact with the ground or in air). Pulses are sent at regular intervals, which allows to rapidly generate an image of the subsurface.

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