FPrimeC Solutions Inc. and their partners were engaged by the client to perform non-destructive evaluation of shotcrete on the soffits of two bridges for the Ministry of Transportation Ontario. The main objective of the project was to evaluate the quality and integrity of shotcrete, and the quality of bond between the shotcrete layer and the base concrete.
The Ultrasonic Pulse-Echo (UPE) method was used for thickness measurements, flaw detection, and evaluation of the integrity of shotcrete. The concept behind this method relies on the propagation of stress waves through materials. Any anomalies in the shotcrete or at the interface of shotcrete and base concrete can potentially result in acoustic impedance. This information can be studied on the Ultrasonic scan to determine the location and depth of potential defects.