GPR Assessment Method of Reinforced Concrete Structures: A Review

Reinforced concrete (RC) structural damage has become a global issue. As a result, there is an increasing need for actual health monitoring methods. The development of reliable monitoring tools for assessing the damage and condition of RC structures has been identified as a pressing requirement. The ground penetrating radar (GPR) method is a valuable non-destructive testing method that depicts excellent potential for being a part of an automated assessment component in RC structures. This paper explores the application of GPR for assessment in RC structures (i.e., localization and estimation of reinforcement bars (rebar), corrosion detection, and void detection). However, the success has been confined to simple scenarios, necessitating the usage of post-processing techniques, i.e., image processing, signal processing, and classification technique. Combining GPR with other NDT methods has long been recognized as having the ability to increase the value of test combinations. This study aims to review GPR as an assessment method of RC structures.