The paper presents the wear surface replacement options analysis methodology that was used to select the resurfacing system for the Lions Gate Bridge North Approach Viaduct in Vancouver British Columbia. The objective was to select the surfacing system that presents the best combination of performance and value. Lions Gate was opened to traffic in 1938. The bridge carries three traffic lanes, the centre lane is a counterflow (reversible) lane whereby two lanes are open to traffic in one direction at any given time, and a single lane is open in the opposite direction. The original bridge deck of the North Viaduct was replaced in 1975 with an orthotropic steel deck. The orthotropic deck was first surfaced with epoxy asphalt concrete and has since been resurfaced several times with bituminous asphalt concrete, most recently in 2001. A list was prepared of potential surfacing systems that have been used on orthotropic decks. The surfacing systems evaluated included: Bolidt ZOK; Epoxy Asphalt Concrete; Gussasphalt; Polyester Concrete; Polymer Modified Asphalt Concrete; Rosphalt 50; and Trinidad Lake Asphalt. An estimated construction cost and life cycle cost was prepared for each alternative wear surface system. Each system was then evaluated based on a number of weighted criteria. The paper presents the ranking for each material, and then presents the outcome in terms of the highest ranking wear surface systems.
Menu
