Inspection and Repair of a Concrete Wharf


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Title: Inspection and Repair of a Concrete Wharf

Author(s): M. Maage, S. Helland, J. E. Carlsen, and M. Ronne

Publication: Special Publication

Volume: 145


Appears on pages(s): 797-810

Keywords: chlorides; concretes; corrosion; deterioration; inspection; latex; marine atmospheres; mortars (material); repairs; service life; silica fume; water content; wharves; Construction

Date: 5/1/1994

Reinforcement corrosion due to chloride ingress is the most common cause of concrete deterioration in Norway. A wharf with dimensions of 270 x 25 m was built in 1965 to 1966 and required partial repairs in 1980, 1986, and 1989 to 1990. The repair work included some research and development. The conclusion of the 1989 inspection was that no corrosion activity was evident in the earlier repaired areas. Repair mortar with silica fume had somewhat lower chloride ingress and significantly higher electrical resistivity than mortar without silica fume. Latex addition to the repair mortar showed the same effect, as well as a reduced water content. The main conclusion is that materials and working procedures used for the 1980 repair have resulted in a satisfactory service life of at least 10 years.