Rehabilitation and monitoring of Sawtells Inlet Bridge: 12 years later

The Sawtells Inlet Bridge was the subject of a major rehabilitation undertaken in three stages in 1991 and 1992. Recent investigations and assessments reveal that although after nearly 12 years of service a significant proportion of the concrete repairs and protective coatings are approaching the need for re-intervention in this very aggressive marine environment, overall the combination of some repairs and associated coatings has proven to have performed in a reasonably satisfactory manner. It may be concluded that both a polymer modified cementitious coating and an epoxy coating have been relatively effective in limiting the ingress of chlorides into the concrete piers. The application of polymer modified cementitious repair material does not seem to have caused or enhanced macrocell corrosion in the neighbouring coated areas. Because of significant chloride levels in the columns, consideration may have to be given to the installation of a CP system (vs. ongoing patch repairs and coatings) to protect the piers from further progress of corrosion, based on a life cycle costing analysis. (a) For the covering entry of this conference, please see ITRD abstract no. E211602.

Language

  • English

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Filing Info

  • Accession Number: 01011221
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0855886986
  • Files: ITRD, ATRI
  • Created Date: Dec 19 2005 2:54PM