GPR (Ground Penetrating Radar) is ideal for all kinds of rebar survey including reinforcing steel location, rebar mapping and concrete imaging.
Rebar mapping surveys can determine rebar distribution (spacing and depth of the different rebar layers), rebar cover thickness, overall concrete slab thickness, and detect any other features within concrete including post tension cables, conduits, ducts, and voids. If rebar locations are required in real time, a GPR survey can be used to locate the reinforcing steel and mark the positions directly on site. Concrete imaging is used to produce highly detailed images at specific locations.
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Our surveyor will attend site and mark the surface in paint, crayon or chalk to indicate accurately referenced scan locations. We will then make passes of the GPR across the surface in a series of sequential scans to collect and save GPR data until the area has been thoroughly scanned in an orthogonal grid. This data is recorded for post processing and interpretation at our office.
At our office, the data is imported into our advanced GPR imaging software and the scans are processed and referenced into a 3D image showing the locations of all the rebar and structural features within the concrete. This image is used to produce a map of the location and distribution of rebars and other features in CAD.
If survey results are required directly on site, the survey will be performed in a similar way However, we perform interpretation of the GPR data in real time and mark the locations of the individual rebars directly on the surface. On-site rebar location surveys are often requested for rebar avoidance during drilling or to target coring activities.
KB GPR Surveys recommend the use of GPR for rebar location surveys. Although GPR requires more expertise to use, it offers improved performance and functionality with respect to induction-based technology (such as Ferroscan). See our blog for further information and comparative equipment tests.
If you require a rebar survey, contact KB GPR Surveys for a quotation at firstname.lastname@example.org