Ultrasonic Testing & Corrosion Mapping
Parking garages, whether they are used for public parking or for a private office building, require proper maintenance to keep them safe.
This necessity is often ignored, thus leaving them in a deteriorative state which jeopardizes their safety; the de-icing salts can cause corrosion, and the cyclic loads from the movement of vehicles can aggravate the condition of the concrete slabs. Non-destructive testing methods, which maintain the structure’s integrity and quality, have thus been designed to accurately determine when a building structure has been jeopardized.
The first method, called ultrasonic testing, measures the travel time of acoustic waves in a medium to locate and quantify delaminated areas on concrete slabs based on the medium’s elastic properties. The second method, called Corrosion Mapping, detects whether or not corrosion is taking place within a concrete structure. Half-cell corrosion mapping, which consists of measuring the potential difference between a standard reference electrode placed on the surface of the concrete with the steel reinforcement underneath, is the most common method used for corrosion mapping. Lastly, Ground Penetrating Radar, is the process of emitting radar pulses that measure the electrical contrast between embedded objects and surrounding areas to determine if corrosion is taking place.
To read more about methods of preservation please visit the following links: