Title: Repair and Maintenance of Berth No 6, Port of Portland

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Publication: CIA

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Date: 2/13/2011

Abstract:
A detailed investigation in 1997 revealed significant deterioration of the wharf above low water level. There was extensive spalling of cover concrete associated with corrosion of embedded steel reinforcement. It was established that chloride ion penetration beyond the level of the steel reinforcement had substantially affected the wharf, in particular the front, rear and side areas. The wharf was in increasing use for general cargo and it was necessary to maintain its structural integrity for this purpose, although the longitudinal crane beams were of no concern, as the berth was no longer required to handle containers. Port staff started structural concrete repairs on the fender wall and transverse beams, but it soon became evident that the work was extensive enough to warrant an integrated repair and protection contract for the whole wharf.