Microwave Non-Destructive evaluation of corrosion in reinforced concrete structures

This paper presents a proof of concept of a Non-Destructive microwave imaging technique for the determination of the corrosion percentage in reinforced concrete structures. This technique is based on a combination of frequency domain measurements of the scattering signature of the concrete structure and the application of thermal induction on the rebar surface. The propagation of the electric fields through the structures is simulated using the scattering theory for metallic cylinders. Transmission measurements on test samples with different cover depths and corrosion percentages of the rebars are performed showing promising results on the detection and quantification of the corrosion in reinforced structures.