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Green cement

What: Did you know that the production of one ton of cement produces 800 kg of CO2?

What is it about:

60% of this is produced during the deacidification of limestone and 40% during the combustion of fossil fuels.

Now here's the tricky part: half of the material produced in the manufacturing of cement is a filler that is not used. Taking coffee as an example, this means that to get one cup of coffee, I would need two cups of coffee. The amount of CO2 emitted is accordingly three times higher.

One could have gone there and optimised a few things. Where can energy be saved at the kiln? What are the transport routes like, is there potential for optimisation, and so on.

Through radical innovation (more about this here), the first step was to focus on what is effectively wanted in the end and then, in a second step, what the way there might look like.

At the Karlsruhe Institute of Technology, a new, promising cement has emerged that can currently be produced in small quantities. The solution approach is interesting.


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