Impact Echo Test

Impulse Echo tests involve introduction of a stress pulse by a mechanical impact and studying the frequency response of the reflected waves. The dominant frequency in the frequency response is used to compute either the depth of the member or the possible depth of the flaw.

Measurement of Thickness of Concrete Members is governed by ASTM C1393- 98a standard.

Avantech Engineering Consortium has carried out Impact Echo tests to assess thickness of tunnel walls, crack depths and voids in tendons ducts in bridge girders.