Prior to the Sydney Harbour Bridge being stripped back to the original concrete deck the asphalt surfacing had only been replaced in small sections and by patching of problem areas. The goal was a smoother and more durable road surface, reducing the need for reactive maintenance, reducing road noise, and reducing the risk of corrosion and structural damage on the deck.
Preparation and planning of all activities included a complete closure of the bridge to normal traffic over two weekends and resulted in the project being completed ahead of schedule.
Boral conducted a full range of mix design work prior to the construction phase to confirm the volumetric properties, resistance to moisture damage, and fatigue performance. All raw materials and production mixes were monitored by testing to ensure all of government technical specifications were met or exceeded performance expectations.