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BASF Aims to Extend Bridge’s Service Life

Tuesday, September 27, 2016

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Sited in an active seismic zone and now the longest span in the country, Turkey’s Osman Gazi Bridge brought some unique needs to its construction.

The BASF Construction Chemicals division was pleased to contribute to the project by providing grout, structural repair mortar, adhesives and injections mortar to help it withstand the environmental and seismic pressures, the company announced Wednesday (Sept. 21).

Osman Gazi Bridge completed
Photos: BASF

The Ozman Gazi Suspension Bridge is one of the world’s largest. Its position in a seismic highly active area required especially high specification for the construction. BASF supported it with expertise and products from its portfolio for the construction industry.

As reported earlier, ArcelorMittal Galati, located in Romania, supplied 34,000 tons of steel to the construction of the bridge, and designer COWI A/S, based in Lyngby, Denmark, built the bridge with earthquake resilience in mind.

To Protect and Secure

At 2,682 meters (about 8,799 feet) in length, the $1.3 billion structure is said to be the fourth-longest suspension bridge in the world and the second longest in Europe.

The bridge, which opened June 30, crosses 64 meters (almost 210 feet) above the Marmara Sea, and Turkey’s most active fault line reportedly passes directly through its abutments.

The abutments that rise from the water are exposed to chloride attack that causes corrosion; however, the construction chemicals division was able to specially develop solutions to help protect the bridge.

Its MasterProtect series of corrosion inhibitors are intended to help defend the bridge’s reinforced concrete, while its MasterFlow grout products assist in securing the structure’s abutments, the company explains.

To anchor the bridge abutments, caisson structures were manufactured on land before being floated over to the wet docks with the help of trailers. The division’s grout solutions were also used in the production of the load-bearing steel columns, it says.

Osman Gazi Bridge construction

The location in an earthquake prone area, the size and time frame required innovative methods and solutions, the company said. It was pleased to contribute grout, structural repair mortar, adhesives and injections mortar to help provide durability and a long service life.

In cooperation with BASF, special tests were performed that led to the selection of the most effective type of grout as well as the suitable application method for the grout used in building the bridge, the company notes.

Other products contributed to the project include its MasterEmaco S series of structural repair mortars, MasterEmaco T series of repair mortars, MasterBrace ADH adhesives, and MasterInject injection mortars, it adds

All solutions and products are part of BASF’s comprehensive Master Builders Solutions portfolio for the construction industry, the company explains.

About the Osman Gazi

Named after founder and first sultan of the Ottoman Empire, the Osman Gazi Bridge is part of a 420-kilometer (about 261-mile) highway project that shortens the distance between Istanbul and the northwest city of Izmir by about 140 kilometers (86.9 miles) and cuts a 70-minute drive around the Izmit Gulf to just six minutes.

Following a 42-month construction period, the new Osman Gazi Bridge can carry more than 40,000 vehicles every day.


Tagged categories: Adhesive; Asia Pacific; BASF; Bridges; Coating Materials; Concrete coatings and treatments; Corrosion control coatings; EMEA (Europe, Middle East and Africa); Grout; Latin America; Marine Coatings; Mortars; North America; Roads/Highways; Steel

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