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Scanning and Imaging of Concrete Slab on Grade

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Quality Control - Scanning and Imaging of Concrete Slab on Grade

The Problem

Scanning and Imaging of Concrete Slab on GradeFPrimeC was retained by Golder Associates to perform Scanning and Imaging of Concrete Slab on Grade elements in Pickering, ON as part of the quality control process. Concrete slab was approximately 22 m x 20 m and 400 mm thick. Concreting was done in a cold day (with temperatures lower than 5 C), and the consultant was concerned regarding presence of voids close to the edges.

Scanning and Imaging of Concrete Slab on Grade

Scanning and Imaging of Concrete Slab on Grade - GPRTwo different non-destructive testing solutions were performed for the quality control of the slab on grade elements:

The two test procedures were used for scanning and imaging of concrete slab. Ultrasonic Pulse Echo is capable of showing defects such as voids, honeycombing, as well as the back end of the slab. Ground Penetrating Radar (GPR) is able to identify the location of steel reinforcement, and uncover potentially large voids.

Concrete Imaging and Scanning Slab on Grade - Ultrasonic Pulse-Echo Scanning