Tag Archive for Tag: Ultrasonic and impact echo methods

Tag: Ultrasonic and impact echo methods Detection of grouting defects

Grouting defects in ducts reduce the corrosion protection around the tendons. Hence, it is important to be able to detect grouting defects using non-destructive methods. The following methods are suitable in principle: · radiography (X-ray method) · ultrasonic methods (reflection or transmission) · impact echo method (elastic waves). These methods are discussed in the following sections. Radiography Radiography is the

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