engleski

Experience with corrosion monitoring using embedded sensors in three bridges on the Adriatic coast

The main aim of the corrosion monitoring in advanced bridge monitoring is to enable early detection of possible failure and contribute to early detection and reliable repair in order to prolong service life as well as lower the costs of the maintenance. This paper presents overview of the results obtained on anode ladder sensors installed in large Croatian bridges exposed to aggressive marine environment for a timescale of 20 years. Data from three large Croatian bridges are presented: Maslenica Bridge (1997), Krka Bridge (2005) and Cetina Bridge (2007), which all had sensors for corrosion monitoring installed in their elements in the execution phase. The sensors have ability to measure macrocell current, half-cell potential and resistivity of concrete through different depths of concrete cover. Measurements of different parameters enable more accurate corrosion state assessment. The results of electrical quantities measured by the sensors are compared with the actual state of reinforcement and concrete observed on the site. Finally the measured corrosion parameters were transformed into damage severity categories according to obtained correlations between measured and actual corrosion states and according to the existing criteria from the literature.

corrosion monitoring, anode ladder, bridge, Croatia, Adriatic coast

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