Non-Contact Evaluation Method for the Corrosion Status of Rebar in Concrete Surface by 3D Measurement

Abstract

This study proposes the method for estimating the amount of corrosion of rebar in concrete from the surface shape measurement of reinforced concrete by using a 3D scanner. We focused on the surface swelling caused by the corrosion of the rebar in concrete, and found the relationship between the change in surface shape and the amount of corrosion of the rebar. As a result, we confirmed that corrosion could not be visually confirmed by 3D measurement, and showed the possibility that amount of corrosion of rebar could be estimated from the amount of surface swelling. We also confirmed that these relationships differ depending on the corrosive environment.