Determine the level of corrosion within RAAC planks non-intrusively.
OBJECTIVES
RAAC planks are a common issue within the UK, and while the identification of the planks is relatively simple, determining their condition is more complex. Using a combination of GPR and intrusive works, most of the condition can be determined. However, a key element is the presence of corrosion within the reinforcement.
SOLUTIONS
In addition to the traditional investigation methods, TRACE-SI used the iCAMM, from INSPECTERRA, to map the presence and level of corrosion within the planks.
As the iCAMM is not affected by the material between the sensor and the bars, the presence of surface finishes did not affect the results. This makes it ideal for the mapping the corrosion.
Several planks were scanned, and the results revealed several areas of corrosion. This was verified against an exposed bar due to corrosion-related spalling.
BENEFITS
Site works were non-destructive, completed quickly, and provided a comprehensive corrosion assessment.
Detailed interpretation of the collected data allowed for detailed mapping of corrosion.