GPR is used to detect reinforcement bars in concrete structures such as bridges, retaining walls, floors, buildings, sea defences, dams, and tunnels. The technology is also able to assess the condition of the internal steelwork.
Detecting reinforcement bars in concrete is only one application of ground penetrating radar. GPR has the ability to find concrete lamination, conduits, voids, cracks, electrical cables, plumbing pipes, and other items embedded in the concrete slabs. It is able to find zones of water damage and corrosion, and measure concrete thickness.
Access to only one side of the object being inspected is required. This enables concrete slab floors and retaining walls to be inspected with ease of access.
GPR inspections are usually quicker than radiography inspections. Less prep time is required for GPR; however, complexity of the structure patterns, such as multiple layers of concrete, can lengthen the overall inspection time.
GPR allows for more accurate location of the reinforcement bars because of its depth measurement capabilities. Depth measurements created through GPR are relatively accurate.