Abstract
Reliable methods are necessary to assess the corrosion level to establish links between structural performance and reinforcement corrosion in concrete structures. Hence, in this study, a set of naturally corroded bars were subjected to metallic brushing, acid immersion, and sandblasting for rust removal. Additionally, 3D optical, CT scanning, and weight loss measurements were used to evaluate the levels of corrosion. The results indicate that sandblasting is an optimal cleaning method. Weight loss measurements are sufficient when detailed information about corrosion is not required, and 3D scanning is preferred if information on corrosion variation along the bar is needed.
Highlights
Corrosion of reinforced steel bars continues to be one of the most frequent and significant type of damageCorrosion of reinforcement in concrete is examined widely by several previous studies
A recent study by Tahershamsi et al [27] pointed out significant discrepancies between obtained results using three-dimensional optical measurement (3D scanning) and weight loss measurement following metallic brush cleaning of naturally corroded steel bars
There is a paucity of similar studies that relate and compare different cleaning methods and corrosion level measurement techniques
Summary
Corrosion of reinforced steel bars continues to be one of the most frequent and significant type of damageCorrosion of reinforcement in concrete is examined widely by several previous studies. Irrespective of the origin of corrosion, all the fore-mentioned studies are based on the measurement of the actual corrosion level with respect to the affected steel reinforcement. A recent study by Tahershamsi et al [27] pointed out significant discrepancies between obtained results using three-dimensional optical measurement (3D scanning) and weight loss measurement following metallic brush cleaning of naturally corroded steel bars. There is a paucity of similar studies that relate and compare different cleaning methods and corrosion level measurement techniques. An exception is the study conducted by Tang et al [24] that presented a direct comparison between gravimetric and 3D scanning to assess the level of corrosion; the results indicated a very reasonable agreement; artificially corroded bars and sandblasting were used as cleaning methods
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