Concrete floor slab survey

Ground Penetrating Radar (GPR) survey is the industrial standard for inspecting concrete structures such as concrete floor slabs. The GPR technology is fully NDT (Non-destructive Technology) and works by transmitting a signal into the concrete floor slab to detect reflections from different targets. These targets could be interpreted as a rebar, a pipe, a cable or an air pocket which would indicate a void.

For concrete floor slab survey to take place, our surveyors will require an unobstructed access to the survey area. The GPR transmitter and receiver are housed within plastic box which is mounted on a trolley allowing it to be easily pushed around the concrete floor slab to collect data without causing any damage or interference to the slab itself.

GPR concrete scanning is used as a cost-effective alternative to intrusive methods such as drilling, coring, or cutting concrete structure for determining subsurface features like rebar and utilities or physically measuring slab thickness. GPR concrete scanning is also necessary step before concrete coring to avoid accidentally hitting a cable, utility or rebar which could weaken the whole structure or cause leaks and costly repairs.

GPR concrete floor slab survey is a fast and efficient way to collect information about concrete floor slabs and can be used on slabs of any size ranging from bus depots, warehouses, and factories to small office buildings.

Our GPR engineers will attend your site and survey the area using our advanced GPR equipment. This allows us to collect multiple lines of data across the surface of the concrete floor slab until it has been comprehensively scanned- usually in a densely spaced orthogonal grid. For the GPR to work effectively, it needs to stay directly in contact with the surface when it is pushed across it. To meet those pre-requirements the surface of the survey area should be unobstructed and relatively flat.

Depending on the feasibility and/or your preference we will either collect data on-site and analyse it at our office or the results will be marked directly on the concrete floor slab.

Please note that marking on site is not always possible. That is true especially for the structurally compromised slabs when the GPR data needs to be accurately processed in an endeavour of improving image quality and visibility of interesting you information.

During our analysis of the GPR data, we will import it into our advanced GPR post-processing software. Once the positions of the scans are referenced, specific filters could be applied to extract the information we are interested in.

Deliverables from a concrete floor slab survey will vary depending on the most appropriate way to present the information, however for the data interpreted in the office you will always receive a CAD drawing and a short survey report detailing any additional information.