Short Answer
The CO2 values in vyzn come directly from the official KBOB life cycle assessment dataset – they are not estimated by us. The clear differences between similar concrete types such as reinforced concrete and recycled concrete are due to the different composition of the material. Since all values are based on the same KBOB data, they are comparable with each other.
Why It Matters
When you weigh concrete variants against each other, you need to be able to rely on the emission values coming from a consistent source. Only then does a difference between two materials actually tell you something about the material itself – and not about where the data comes from.
How It Works in vyzn
The greenhouse gas emissions of the materials in vyzn come directly from the official KBOB life cycle assessment dataset – the official source for life cycle assessment data. Differences between similar concrete types result from their composition: cement content, reinforcement and recycled content have a direct impact on greenhouse gas emissions. Because all values are based on the same KBOB data, you can compare them directly with each other.
Practical Example
The comparison is most meaningful at the building component level: create one component per variant with the corresponding material layer – for example, one with reinforced concrete and one with recycled concrete – and compare the results side by side.
Frequently Asked Questions
Are the CO2 values in vyzn estimated?
No. The values come directly from the official KBOB life cycle assessment dataset.
Can I compare different concrete types directly with each other?
Yes. All values are based on the same KBOB data and are therefore comparable with each other. The comparison is most meaningful at the building component level.