ZKG Newsletter 1|2023
Availability of cement raw materials
Cement plants with capacities of 1 million t per year consume 1.5 million t of raw materials, which corresponds to almost 5000 t/d, and this over a period of at least 40 years. Most of the raw materials are for the clinker manufacturing, but depending on the clinker factor large quantities of cement additives are also required. [Photo: OneStone Consulting]
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thomas gruppe acquires Opterra Zement GmbH
and Opterra Beton GmbH
The thomas group acquires Opterra Zement GmbH and Opterra Beton GmbH, two companies of the international CRH Group, at the end of 2022. This includes the Karsdorf plant, the decommissioned Sötenich plant and the Neufahrn ready-mix concrete plant. [Photo: Opterra]
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Rohrdorfer improves CO2 footprint of concrete
with AI from alcemy

[Photo: alcemy]

The start-up alcemy and the building materials manufacturer Rohrdorfer are testing how the carbon footprint of ready-mix concrete can be further improved in a joint pilot use phase. This is to be achieved with the help of artificial intelligence (AI). This predicts the quality parameters of the concrete already during production, using special sensor data from the mixing plant and truck mixer.
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On the road to the climate-neutral company
The CO2 footprint of the building-materials industry is of very significant magnitude. Holcim is playing a leading role in climate-neutral transformation. The declared objective: Climate neutrality. And Holcim is working consistently on reducing the CO2 footprint of its plants, products and solutions. [Photo: Holcim]
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Study on resource conservation in cement and concrete production

[Cover: VDZ]

In addition to climate and species protection, the conservation of natural resources is one of the major ecological challenges of our time. In this context, the focus is also on cement and concrete production, which accounts for around one fifth of the primary raw materials used in Germany. “As an industry, we are aware of this enormous demand and are ready to take responsibility for an even more careful use of natural resources,” explains Christian Knell, President of the German Cement Works Association (VDZ). The new VDZ study “Resources of the future for cement and concrete – potentials and strategies for action”, which has now been published, shows what a 2050 scenario for further reducing the use of primary raw materials might look like.
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Highlights of the Current Issue
Sustainability – the future for cement and lime
On the road to the climate-neutral company
Dynamic simulation of the cement process to reduce emissions and improve energy efficiency
Physical-mechanical properties and hydration microstructure of slag powder/cement system with different nanoparticles
 » Current Issue
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