08 May 2008
Accidental damage to the concrete deck of a heavily trafficked bridge in Brisbane, Australia during removal of diesel damaged asphalt earlier this year called for a quick repair solution. The bridge forms part of a 5 km motorway opened in 2002 which links the Port of Brisbane with the main motorway network, and is used by more than 4000 vehicles per day.
Long term closure of the bridge was not possible but the damage created an increased risk of reinforcement corrosion in the future. Project Engineer Parsons Brinckerhoff opted to use Eliminator, a spray applied waterproofing system from Stirling Lloyd, which could be directly overlain by the new asphalt surfacing.
The two layer Eliminator system, which contains methyl methacrylate resin, and a high performance SA1030 bond coat were applied to the damaged section during weekend closure of the bridge. Application of the membrane and bond coat was followed by resurfacing and the bridge was reopened to traffic by the Monday morning.