Monitoring of water imbibition of a particular porous pavement structure by impulse and step-frequency radar

Ground-penetrating and step-frequency radar (GPR & SFR) were performed on a particular porous pavement structure. This pavement test site was designed in the frame of a general research on energy storage, using capture solar energy, for deicing road in winter. The objective herein is to monitor water imbibition at the early stage in the pavement to estimate the fluid transfer. Amplitudes and travel times, processed from GPR Bscans measurements, are studied and discussed in association to full wave-form inversion (FWFI), used on static SFR measurements which enable to give quantitative information. GPR picking and SFR inversion results are commented and compared during a complete imbibition process.