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The Impact Echo (IE) system is designed to determine the condition and thickness of concrete, wood, stone, and masonry structural members when voids, honeycomb, and/or cracks are suspected.
Impact Echo (IE) investigations are performed to assess the condition or thickness of slabs, beams, columns, walls, pavements, runways, tunnels, and dams.
The Impact Echo (IE) system is designed to determine the condition and thickness of concrete, wood, stone, and masonry structural members when voids, honeycomb, and/or cracks are suspected. IE investigations can also be performed to predict the strength of early age concrete if the member thickness is known.
Lastly, the IE method will provide information on the depth of a flaw or defect, in addition to mapping its lateral location and extent. An advantage of the IE method over the Ultrasonic Pulse Velocity (UPV) method is that only one side of the structure needs to be accessible for testing.
Olson's IE Models are sold as add-on systems for the NDE 360 and Freedom Data PC platforms, while the Concrete Thickness Gauge (CTG) is designed to be used with a Windows Device supplied by the user.
Performing the IE method at a sound concrete location gives results similar to the figure shown.
A single, clear peak representing a known thickness is indicative of sound concrete. The slab investigated was 280 mm thick and the bottom echo results in a peak at 280 mm.
