BHS twin-shaft batch mixer for the world’s longest immersed tunnel

November 15, 2021
SBM Mineral Processing GmbH in Oberweis, Austria outfitted two of its plants with BHS twin-shaft batch mixers of type DKX 4.5 to produce concrete for tunnel components. 3,000,000 m³ of concrete is required to construct the world’s longest immersed tunnel.

The Fehmarnbelt Tunnel, which has been under construction since 2021, will consist of a four-lane highway and an electric railway with two tracks and promises to make travel between Germany and Denmark, as well as between all of Scandinavia and Central Europe, faster and more comfortable. It links Fehmarn, Germany and Lolland, Denmark and makes it possible to travel regardless of wind and weather, waiting times or reservations. This significantly reduces the amount of time it takes to cross the Fehmarnbelt (the straight between the two islands): drivers only need 10 minutes to cross instead of 45 minutes. If you take the train from Hamburg, you can reach Copenhagen in less than three hours, as opposed to the four and a half hours it used to take. The tunnel is planned to open in 2029.

In 2021, two mixing plants were outfitted with BHS twin-shaft batch mixers of type DKX 4.5 to produce tunnel components for this large infrastructure project. This mixer produces 4.5 m³ of concrete per batch. The DKX has proven itself multiple times over in the production of concrete for precast parts for tunnel construction and offers consistent mixture homogeneity, even when it’s used to mix complex formulas. Three additional plants are due to commence operations in the middle of 2022.