Impact Echo Scanning
Impact Echo Scanning (IES) investigations are performed on large structural members with smooth concrete where shallow voids, honeycomb, cracking or delaminations are of primary concern.
The Impact Echo Scanning (IES) system is designed for large area investigations of shallow voids, debonding/delamination, cracking, or honeycomb often found between an overlay on a bridge deck or surrounding dense rebar mats. IES is commonly used to evaluate post-tensioning (PT) cables used in reinforcing various structures and determining duct grout condition. The scanning technology allows tracing of ungrouted PT cables through slabs and beams. An advantage of the IES method is that only one side of the structure needs to be accessible for testing.
The IES Method is based on the Olson Engineering patented technology of a rolling transducer and automated impactor for near-continuous Impact Echo based thickness and flaw scanning of structural concrete and pavements. Performed at slow walking speeds, test results are obtained every inch (25 mm) in a line and multiple lines can be combined for 2-D to 3-D displays of concrete thickness and locations of internal void, honeycomb, cracking, delamination, etc. The scanning method is capable of determining bottom echo thicknesses up to ~ 40 inches (1 m).
Impact Echo Case Studies
- Bridge Decks
- Post-Tensioned Ducts
- ASTM C1383-04
Hands-on training is available for all of our NDE test methods at our Wheat Ridge, Colorado (USA) location, which is a suburb located approximately 15 minutes northwest of downtown Denver. Training may be available at your location by one of our agents/engineers upon special arrangement.