Assessment of the Residual Life of the Repaired Arousa Bridge
// Оценка остаточного срока службы отремонтированного моста через Арусу //
José Antonio Becerra-Mosquera et al (Spain)
Это исследование посвящено наблюдениям за состоянием моста на острове Аруса, важнейшего объекта инфраструктуры, соединяющего остров Аруса на северо-западе Испании с галисийским побережьем. В настоящей работе оценивается эффективность ремонтных мероприятий, проведенных в 2023, с уделением особого внимания риску коррозии и долговечности системы катодной защиты, установленной для снижения рисков коррозии в железобетоне, подверженном воздействию суровой морской среды.
Abstract: This study focuses on the evolution of the Arousa Island Bridge, a critical infrastructure connecting, in northwestern Spain, the Arousa island to the Galician coast. Since its commissioning in 1985, the bridge has experienced damage due to corrosion, culminating in a major repair intervention in 2011 using hybrid galvanic cathodic protection. This repair was essential in addressing identified pathologies and ensuring the safety of the structure. In 2021, additional repairs needed to be completed, and a thorough study and testing campaign was conducted in 2023 which included the extraction of zinc anode samples from the bridge. The present work evaluates the effectiveness of the repair measures implemented since the intervention, with particular attention to corrosion risk and the durability of the cathodic protection system installed to mitigate corrosion risks in the reinforced concrete exposed to a harsh marine environment. A key aspect of this study is the correlation established between the indirect measurements utilized to evaluate zinc consumption within the cathodic protection system and the direct assessment obtained from the extraction of the anodes, which provides a tangible measure of this consumption. The calculated service life was updated with the measurement, and the integrity of the system was assessed.
Assessment of the Residual Life of the Repaired Arousa Bridge / Becerra-Mosquera JA, Carro-López D, Herrador MF, Eiras-López J. // Infrastructures 2025, 10(6)б 141. https://doi.org/10.3390/infrastructures10060141
https://www.mdpi.com/2412-3811/10/6/141
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