Archivio Istituzionale della RicercaThe geometric morphology of pits induced by corrosion has been investigated. To this aim, twenty-four seven-wire strands coming from 10 years old naturally corroded prestressed concrete beams have been analysed. The cross-sections of corroded strands were measured and examined in detail. The morphology of corrosion pits has been recorded by using a structured light 3D scanner and classified in terms of maximum pit depth, longitudinal dimension, and transversal width. Then, a new method for the approximate evaluation of the average pit depth of prestressing strands has been proposed. Finally, the pitting factor of the corroded samples has been calculated.
Corrosion morphology of prestressing steel strands in naturally corroded PC beams / Vecchi, Francesca; Franceschini, Lorenzo; Tondolo, Francesco; Belletti, Beatrice; Sánchez Montero, Javier; Minetola, Paolo. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - ELETTRONICO. - 296:(2021), pp. 1-20. [10.1016/j.conbuildmat.2021.123720]
Corrosion morphology of prestressing steel strands in naturally corroded PC beams
Tondolo, Francesco;Belletti, Beatrice;Minetola, Paolo
2021
Abstract
The geometric morphology of pits induced by corrosion has been investigated. To this aim, twenty-four seven-wire strands coming from 10 years old naturally corroded prestressed concrete beams have been analysed. The cross-sections of corroded strands were measured and examined in detail. The morphology of corrosion pits has been recorded by using a structured light 3D scanner and classified in terms of maximum pit depth, longitudinal dimension, and transversal width. Then, a new method for the approximate evaluation of the average pit depth of prestressing strands has been proposed. Finally, the pitting factor of the corroded samples has been calculated.
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https://hdl.handle.net/11583/2904492