Concrete Floor Slab Surveys

Ground Penetrating Radar (GPR) can be used for surveying concrete floor slabs such as those in warehouses, buildings, factories, depots and car parks. A GPR concrete floor slab survey can determine structural information including the slab thickness, distribution of reinforcing bars, concrete cover thickness and the locations of pile caps and ground beams.

Depending on the density of the rebar within the concrete floor slab, GPR can also be used to look through the slab to measure the thickness of the base layer beneath the concrete and detect the presence of pipes, cables, drainage, conduits and potential voids.

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Why use GPR for concrete slab surveys?

Ground Penetrating Radar is a NDT (non-destructive technology) which works by transmitting a signal into the concrete floor slab and detecting reflections from different interfaces such as those between the concrete and the rebars, or the concrete and air in the case of a void. The GPR transmitter and receiver are housed within a plastic box which is mounted on a trolley which can be pushed around the floor slab to collect data without causing any damage or interference with the slab itself – all that’s required is unobstructed access to the survey area.

Because of the way GPR works, it can recover a lot of information about the floor slab quickly and efficiently and it can be deployed to survey concrete floor slabs of any size: from a bus depots to a warehouse or factory to a small office building.


How a concrete floor slab survey is performed using GPR?

KB GPR Surveys attend site and, using our advanced GPR, 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. Our GPR will need to be in contact with the surface and pushed directly across it to work, for those reasons the surface should be unobstructed and relatively flat.

Sometimes GPR data is interpreted on site and the results are marked directly on the concrete floor slab, however its more common and efficient for GPR data to be collected on site and saved for office-based post processing and interpretation.

GPR data will be imported into our industry leading GPR post-processing software, the positions of the scans are referenced and then processes are applied to remove unwanted noise and to highlight the desired features. These scans are then merged to form a 3D view from which results can be interpreted and recorded.

Concrete floor slab survey deliverables

Deliverables from a concrete floor slab survey will vary depending on the most appropriate way to present the information, typically they will include a CAD drawing and survey report detailing any additional information.

If you require a concrete floor slab survey, contact KB GPR Surveys for a quotation at



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