GPR or Ground Penetrating Radar is a great way to inspect concrete structures. The USP of the technique is its non-destructive capabilities to thoroughly inspect the concrete structure. From accurately inspecting the concrete to measuring slab thickness and locating bars, conduits, and PT cables, the GPR equipment allows engineers and inspectors to perform a thorough inspection of the concrete without the need to drill the concrete. This makes the GPR for concrete scanning highly significant for installation, maintenance, and repair work of both new structures and existing structures.

Have a brief look at the significance and applications of ground penetrating radar for non-destructive testing of concrete.

1. Concrete Assessment

GPR scanning helps in the concrete assessment. It helps in gauging the thickness of the concrete, the reinforced bar content, and the spacing of the bars. Based on the information of GPR scanning, engineers make necessary decisions related to the stability and design of the slab and make recommendations.

2. Detection of Reinforced Steel

GPR scanning helps in locating rebar and post-tension cables within the concrete without drilling the structure that helps in preserving the integrity of the structure, and reduces the need for repairs or patching, and prevents accidents, injuries, or delay. Engineers can safe-mark the reinforced steel locations on the surface of the concrete that acts as a ground for drilling operations for plumbing, electrical outfitting, fire protection services, drain installation, and ductwork.

3. Voids Detection

Voids in the concrete structures occur due to a variety of reasons such as compaction, pipe ruptures, or erosion, and are often undetectable on the surface. Concrete Scanning with GPR helps in void detection in the concrete slabs and subgrades. This helps designers, engineers, and project managers locate air gaps and take necessary actions to avoid collapses.

4. Locate Electric Conduits

It is very important to locate electrical embedded services and conduits when performing repairs and maintenance. Drilling at the wrong location can lead to accidents, power outages, hampered workflow, and costly repairs.

GPR scanning helps in the accurate detection of the electrical and PVC conduits. And what makes it special is there is no need to access the concrete from both sides, as in the case of X-ray inspection. You can locate the conduits just from one side.


With the help of accurate mapping, the maintenance staff can make the necessary repairs and renovation tasks without damaging the embedded facilities.

So this is the key importance of the GPR for concrete screening.

If you are looking for concrete GPR scanning in DC, our team of Concrete Insight engineers can help you with your project requirements. We have been into Concrete Scanning and Testing for the last 25 years. Connect with our license experts to discuss your project.