Osman Gazi Bridge (Izmit Bay), Turkey
Eliminator waterproofing system protects essential major transport link
Built over the Sea of Marmara in Turkey’s Izmit Bay between 2013-2016, the Osman Gazi Bridge, or ‘Izmit Bay Bridge’, as it is often referred to, is the fourth longest suspension bridge in the world.
Spanning over 1.5km, the bridge’s construction will revolutionise travel between the north and south of the country, enabling passengers to make the journey across the sea in just three minutes instead of joining the long queue to take the one-hour intermittent and uncomfortable ferry ride or the alternative highly trafficked 100km detour over land. The bridge opened to service on 30th June 2016.
The bridge is expected to become a highly trafficked route through the country, both for Turkish locals and for global businesses to transport their goods between Asia and Europe.
Turkish State of General Directorate of Highways
Erse Teknolojik Yapi Endustri A.S.
- Izmit Bay.pdf
Stirling Lloyd’s Eliminator system was specified by KGM for the bridge deck waterproofing, following numerous other high-profile collaborations in Turkey, including the Bosphorus Bridge, Fatih Sultan Mehmet Bridge and Haliç Bridges.
Given the time limitations on the construction work and the nature of the structure, the selected bridge deck waterproofing system needed to not only provide proven long-lasting protection, but allow quick and easy application too. Importantly, it also needed to have minimal environmental impact over its lifetime.
Having worked on several major projects in the country over the past thirty years, Stirling Lloyd was contracted by IHI E&C to take the lead on the waterproofing for the main central section of the bridge. The coating process began on 14th May and was completed within four weeks. In that time, Authorised Contractor Erse coated 76,000m2 covering the entire central section of the bridge. In addition, Stirling Lloyd’s Safetrack HW was applied on the bridge’s walkways to provide a high performance, long-lasting anti-skid surface finish.
There were two phases to the waterproofing application process: the preparation, followed by the waterproofing system itself. In the initial phase the steel bridge deck was prepared by shot blasting using metallic grit. Next, once the quality of the preparation had been approved, meeting the Sa 2.5 Standard required, the speed of application of the Eliminator waterproofing system was paramount, to deliver against the tight schedule.
The applicators were able to apply 4500-5000m2 of the bridge waterproofing system per day, facilitating quick contract progression. This was made possible due to the speed and ease of application of the Eliminator system, together with the fact that each element of the system cures in under an hour, enabling the next element of the system to be applied immediately.
Umut Dizman, Marine works operations and construction manager for IHI has said "Perfect product to be used on steel deck bridges."
Daghan Erel, Regional Sales Manager at Stirling Lloyd Polychem, for Turkey and Central Asia comments: “We are very proud to have been part of such a high profile and prestigious project. The Osman Gazi Bridge will provide a significant boost to the region’s economy and will make a huge difference to travel costs and efficiency for both local and foreign businesses operating and transporting products through the country.
“Given the significance of this project, we were under a great deal of pressure to ensure that the Eliminator was applied quickly and effectively to protect the bridge for decades to come. To meet these objectives, we had a skilled team on board to ensure that the Eliminator product could be applied quickly and safely; this was a key element for a project such as the Osman Gazi Bridge. We are confident that our product will protect the bridge deck for years to come and will help it to stand the test of time.”
Bridge waterproofing on the Osman Gazi Bridge needed to be carried out as quickly and as efficiently as possible.
Not only is Eliminator a rapidly curing system but it also provides a tough, durable membrane that can withstand difficult site conditions. It will also extend the service life of the bridge. This will help to reduce maintenance costs in the long term.