Bridges

Transport for NSW (TfNSW) utilises various electrochemical protection systems such as cathodic protection, chloride extraction and re-alkalisation.

Whilst the technical merits for re-alkalisation and chloride extraction are proven, there have been only a limited number of full-scale applications within TfNSW due to their relatively high application cost. However, there are specific scenarios or environments with unique factors that warrant the potential use of these systems. TfNSW has explored the potential for implementation of chloride extraction and realkalisation (active/passive) through various research and development projects and trial studies. Recently TfNSW has completed its first full-scale application of realkalisation.

This paper presents results of the research and development case studies, trial applications and the recent full-scale project (TFNSW Bridge BN 415 Windsor Bridge).