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Tag: concrete

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There is no reason for the industry to use groundwater, said Ulrik Hindsberger, director of the Pipe Center at the Danish Technological Institute, at the conference on sustainable construction. Photo: David Arnholm.

Groundwater is scarce: Technical water in abundance

Inside the casting halls at the element factory, work is done at high pressure. The first standard element just needs one of 20 segments to be complete.

See photos: First tunnel element nearly complete

There are 130 concrete sleepers per wagon load, so 800 trips between the factory in Fredericia and Lolland are required before there is enough for the 32 kilometers between Nykøbing Falster and Holeby.

106 wagon loads of sleepers and ballast per kilometer of railway

The weather – especially windy weather – is a challenge for the outdoor casting work on the Fehmarntunnel's special elements.

Weather challenges outdoor casting work

The permanentization of the element factory at Rødbyhavn creates a paradox between socio-economic and climate goals and interests

Analysis: The element factory collides with the climate crisis

There is broad political agreement to preserve the element factory in Rødbyhavn after the opening of the Fehmarntunnel. There is hardly as much agreement about the specific ownership.

Blue parties will sell the element factory – at any price

The bottom of the tunnel portal on the Fehmarn side has started to take shape.

Watch video: German tunnel portal emerges on Fehmarn

The 20,000 cubic meter floating concrete gate had to be moved into place before the storm surge

Flood tested floating concrete gate

Crushed waste concrete can already replace stone in concrete production. Now a new project must develop a method so that crushed concrete can also replace a third of the sand.

Will use crushed waste concrete to replace sand in new concrete

Crushed waste concrete can already replace stone in concrete production. Now a new project must develop a method so that crushed concrete can also replace a third of the sand.

Will use crushed waste concrete to replace sand in new concrete

It could end up with a bill of up to 80 billion Euros (596 billion kroner) to upgrade 9,000 kilometers of German railways. But the money is the least challenge for Deutsche Bahn.

Analysis: Many unknowns in Deutsche Bahn’s billion-euro equation

It took between 50 and 52 hours to cast the first of a total of 711 tunnel segments back in July. When everything goes according to plan, a production team of 100-150 people must be able to complete the job in 27 hours. Photo: Femern A/S

Two segments down – 709 to go

Casting work on the first tunnel segment is already in full swing. Femern A/S does not want to answer what it will mean if the project has to be postponed at this advanced stage.

Femern A/S: Scandlines is concerned about competition

While we were on holiday: Cement order for Aalborg Portland and start of casting work

Kasper Roug (MF, Socialdemokratiet) has no doubt that the element factory will remain in Rødbyhavn - also after the Fehmarntunnel is scheduled to be completed in 2029.

Danish MP: The element factory will stay in Rødbyhavn

Until May 15, the public can help decide which project will replace the question mark at the Concrete Innovation Award 2023.

Votes are welcome for the Concrete Innovation Award 2023

Structural engineers will be needed in large numbers once the casting work with the tunnel elements for the Fehmarntunnel gets underway in earnest later this year. But there are not many who choose the education, and this can become a problem.

Vocational education for structural engineer training in free fall

The tunnel is to be built from 79 standard concrete elements, each 217 meters long and weighing a whopping 73,000 tons, and 10 special elements that are just under 40 m long. PERI supplies the molds for the standard elements. Photo: PERI

Now the tunnel elements can take shape

Concrete can and must be recycled - and in many cases it is better to crush it into aggregate than to reuse it.

Concrete is usually best recycled as aggregate

Cement production is one of the major CO2 culprits, and the CALLISTE project must do something about it.

Industry cooperation must make cement and concrete more sustainable

When the 73,500-tonne tunnel elements have been cast, they must be pushed out via one of the three sets of Skidding Beams to the dry dock and then floated out to their final position.

Epoxy makes it all slide

Recycon Elements turns construction waste into new concrete elements.

Recycled concrete is the solution to material shortage

For a brief note, Andreas is changing his workplace at FLC in Rødbyhavn to DM i Skills in Fredericia.

Mixes concrete on a daily basis – on the way to the national championship

Artificial intelligence and drones find damage in concrete

Femern Bælt-tunnelen bygges med råmateriale fra Europas største stenbrud i Jelsafjorden i Norge.

From Europe’s largest quarry to the world’s longest submersion tunnel

The 166 meter long and 20.5 meter wide cargo ship Splittnes has arrived at the working harbor in Rødbyhavn with 12,000 tonnes of shards.

Largest ship to date docks at the working port

The casting pressure gauge in action during the casting of the basement under Europa Plads in Aarhus.

Pressure gauge halves the casting time for concrete

Danish Maturix has won the contract for the equipment and software to be used to monitor the concrete curing project.

Maturix supplies measuring equipment worth millions to Fehmarn

Bæredygtig Beton initiativet under Dansk Industri barsler snart med en ny branchehandlingsplan, der skal nedbringe CO2-aftrykket fra betonkonstruktioner. Sidste frist for høringssvar er mandag.

Last chance for hearing responses to concrete industry guide

The first of the element factory's three production halls is getting ready to cast.

Production hall close to completion

The startup company Nordphos has had a test facility set up in Rødbyhavn to find out if you can purify yourself into water that can be used in concrete production.

Ready to deliver technical water on a grand scale

Groundwater reserves on Lolland are under such pressure that continued production at the element factory after the Fehmarn tunnel must be done with grey water.

End of tap water for the element factory after the tunnel project

Concrete expert gives green light for grey water in the concrete

It requires an extraordinary amount of tap water to build a Fehmarn tunnel. Lolland Municipality hopes to be able to supply the building with 'grey water' instead.

Lolland Municipality is hoping for grey water for the element factory

Clay in the concrete and recycled steel for the future

The roadmap is ready for the future of the element factory

The robots enter the ground through a plastic pipe and supply the building material directly

Six meter tunnel built by robots

3D printed office building in Hausleiten

3D printing with concrete attracts customers and investors

Sustainable concrete calls for a conference

Valuable knowledge from trial casting

Stable energy supply is critical for the concrete mixing process. It can cost several millions if the power is cut off prematurely

Power outages can cost several millions

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