Ideal for thick concrete structures, Concrete Ultrasound is a recent development in ultrasonic non-destructive testing (NDT). A short pulse is produced by hitting the surface with a small metal object, then shear wave reflections are recorded. A two-dimensional array of transducers then generates an image.
When scanning large concrete areas such as slabs, beams, columns, and walls, conventional Ground Penetrating Radar is unable to provide the most accurate reading due to interference and larger depths.
Using Concrete Ultrasound Xradar™ is able to scan large areas and produce accurate, detailed surveys, along with steel reinforcement drawings which will help you study the carry capacity of a concrete slab. Our industry leading techniques are able to produce precise drawings of rebar locations, cover measurements, diameters, and slab thickness.
Applications of Concrete Ultrasound
One of the main applications of Concrete Ultrasound is the detection of voids, along with detecting any pre-stressed tendons, conduits and other partially hollow objects.
The major advantages of our Ultrasound services are its ability to penetrate concrete to considerable depth – up to 2.5m, even in reinforced concrete. Even more importantly, it can be used to detect objects through dense surface rebar mat or other heavily reinforced structures which would interfere with conventional GPR.
The MIRA tomograph by ACSYS, manufactured in Russia, is the most advanced instrument of this kind today, thanks to its 12×4 transducer with dry-contact ceramic tips and a complex SAFT signal processing. Shear wave is used due to its higher sensitivity to defects and its slower velocity (2500 m/s instead of 4000 m/s for the compression wave).
The scanner works by sending a short pulse through the concrete, produced by hitting the surface with a small metal object. The instrument then records the shear wave reflections and produces a two dimensional array of transducers then generate an image. Our specially trained technicians then analyze the images to produce a report tailored to your needs.