MCI® technology applied on the Pelješac bridge ensuring the road connection between two parts of the country

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Pelješac Bridge (Photo: Cortec® Corporation)

Ranked among the most demanding bridges in the world, not only in terms of construction complexity but also complex design, measuring 2,404 m (7,887.14 ft) in length, the Pelješac Bridge is one of the projects largest and most extensive infrastructure in Europe. The connection of the Croatian Pelješac peninsula to the mainland to bypass a short stretch of the coastline of Bosnia and Herzegovina began three years ago.

The project is worth € 550 million, although most of the funding comes from the European Union.

In order to meet the main design quality criteria, such as stability, durability, economy and integration into the environment, the inventive design proposed the construction of an overdosed bridge with an integrated hybrid structure comprising five central spans, each 285 m long, and six low pylons. AA particularly careful approach has been taken to ensure durability over an extended service life of over 130 years.

MCI® technology applied on the Pelješac bridge ensuring the road connection between two parts of the country

(Photo: Cortec® Corporation)

Cortec’s MCI® 2018 was specified on this project during the design phase as a silane-based impregnation with a migration inhibitor property to protect against the harmful effects of corrosion, thus extending the life of the bridge. . MCI® 2018 is a 100% silane-based concrete sealer containing migrating corrosion inhibitors that allows deep penetration into concrete and provides water impermeability by chemically reacting with the cementitious substrate. It seals surface pores, prevents intrusion of chlorides, reduces carbonation and protects against the penetration of wind-driven rain. Treated concrete surfaces are fully breathable and their natural water vapor transmission is not affected.

After repairing surface damage and cleaning up discolorations and other surface defects, the concrete surface of the pylons should be protected with a colorless silane coating to improve durability and increase the resistance of the concrete surface to external influences. long term. MCI®-2018 carries CE certification which indicates compliance with health, safety and environmental protection standards for products sold in the European Economic Area (EEA).

MCI® technology applied on the Pelješac bridge ensuring the road connection between two parts of the country

Pelješac Bridge (Photo: Cortec® Corporation)

85mm stainless steel reinforcement and impregnation of all concrete surfaces with MCI®-2018 was chosen as a strategy to help the bridge reach a service life of 130 years. MCI®-2018 was applied over the entire substructure of the bridge. All concrete parts were coated with MCI®-2018 by a spray technique. The work was carried out in accordance with the requirements of the project and after preparation of the surface to full functionality. This included:

  • Access to pylons
  • Rehabilitation of the concrete surface of the pylons
  • Cleaning of the concrete surface of the pylon (washing the pillars with water)
  • Impregnation of the concrete surface of the pylon with MCI®-2018.

MCI®-2018 contains proven migratory corrosion inhibitors (MCI®). The silane component provides water impermeability by chemically reacting with the cementitious substrate under proper application, decreasing the penetration of aggressive materials. The product penetrates deep into the concrete, providing corrosion protection to the reinforcing steel against existing water and chloride ions, or other contaminants. For the Pelješac bridge, continuous monitoring of the condition of the structure at a central location will be carried out during the construction phase and the operation phase to examine the parameters of structural behavior, weather, seismic activity and the structural durability.

MCI® technology applied on the Pelješac bridge ensuring the road connection between two parts of the country

Pelješac Bridge (Photo: Cortec® Corporation)

The bridge designer specified corrosion protection for all concrete segments to achieve a service life of 130 years. When completed, the Pelješac Bridge will be ranked as one of the five largest and most attractive European bridges, built at the start of the 21st century. This important new structure connects two distinct parts of Croatia and bypasses border posts on the short coastal strip near Neum in Bosnia and Herzegovina.

MCI® technology applied on the Pelješac bridge ensuring the road connection between two parts of the country

Cortec CEO Boris Miksic, a Croatian-American businessman, is proud that his patented technology was used on this landmark project to connect two parts of his country. “Our MCI® technology is used in major construction projects around the world. I have devoted more than forty years of my life to developing the most advanced and environmentally friendly corrosion protection solutions. To witness its application in my home country on this monumental bridge structure is really a special feeling. Croatia has gone through difficult times, having had to fight for its independence in a war 30 years ago. Seeing it thrive and develop in one of Europe’s most coveted countries seems quite right and the completion of the Pelješac Bridge is a huge step forward for all of us.

MCI® technology applied on the Pelješac bridge ensuring the road connection between two parts of the country

You can read more about the migration of corrosion inhibitors (MCI®) here: https://www.cortecmci.com/

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