Overcoming reflective issues from congested reinforcement
Multi Array Ultrasonics
When encountering post tensioned ducts and or highly reinforced concrete containing congested reinforcement patterns, GPR / Impulse Array will fail to detect voidage within the post tensioned duct or behind the reinforced steel.
In these instances Ultrasonic Technology can be employed to discover any hidden voids and defects. This technology utilises a multi array ultrasonic approach to overcome the reflective issues that metallic objects create when GPR is employed. This enables the engineer to accurately pick up hidden defects (ie the results of poor grouting within post tensioned ducts) and voids in such circumstances.
It is vital that engineers are able to utilise GPR & Ultrasonic devices simultaneously during the investigation as this may be the only possible way to get the information the client requires.
Let’s begin..
The Structural Testing Advice Group aims to highlight the pros and cons of various devices, bringing real world examples and experience to our industry enabling those working within it to be able to do so with the latest information and best approach possible.
More to follow…