|To Repair, Waterproof and provide a Heavy-Duty Traffic surface for decks on piers at Woodbridge Bay, Roseau, Dominica.
Port of Woodbridge Bay is used for all cargo for Dominica and provides an essential “lifeline” for all commerce for the island.
The tidal wave action caused concrete to crack and allowed water into concrete resulting in corrosion of the reinforcing steel, severe concrete spalling, and significant delamination of the concrete deck and structural beams. Many steel piles were rusted, and Fibre-Prime cementitious rustproofing with migrating corrosion inhibitor was used to protect steel surface.
Deteriorated concrete was removed and sandblasted. The exposed rebar was sandblasted, and Fibre-Prime rustproofing applied to protect and prevent further corrosion. Wet process shotcrete Spray-Con WS ST was applied to repair the underside of decks.
The surface of concrete decks represented a special problem, since it allowed only a thin surface overlay (due to structural limitations).
The traffic coating system had to waterproof and protect existing concrete against further salt penetration, but at the same time withstand heavy-cargo equipment traffic, and impact and dragging of heavy containers.
The entire deck surface was wet sandblasted to obtain a clean and well profiled surface. Existing drying shrinkage cracks were treated, deep delaminations and patches were repaired using Fibre-Patch OV, polymer modified non-shrink cement mortar.
The surface was water saturated and allowed to obtain SSD condition, before the Cem-Kote Barrier Cote 100, a high-flow repair mortar was spray applied and broom finished in two coats to a total thickness of approx. ¼” (6 mm).
The entire system provides waterproof, protective and high abrasion & impact resistant deck coating, that delivers a long-term performance required – at a much lower cost that thick overlays.
Total area of deck surface protected was over 40,000 ft2 (3,720 m2), and in total over 60,000 ft2 (5,600 m2) of surfaces were restored or protected on this project. The project started in 2015 and finished in 2016.