Three Victorian bridges have been investigated to determine their management needs in order to prevent development of corrosion damage in the structures. After visual inspection of the bridges, electrochemical measurements including direct measurement of corrosion rate of reinforcement were conducted on selected areas of the structures, and relevant properties of concrete determined in those areas. Based on the data obtained, the concrete in the tidal zone has been identified as needing the most attention for two of the bridges exposed to seawater. Further monitoring is recommended to determine when intervention such as cathodic protection may be necessary. For another older bridge, not subjected to seawater, deterioration appeared in the form of carbonation of concrete in some beams, salt efflorescence at the deck soffit, and localised corrosion of some column bases, caused by poorly compacted concrete. Remedial options have been proposed for these elements. (a)
Samenvatting