Holcim and Paebbl Deploy First Carbon-Storing Concrete Slab in Germany

sustainableconstruction-now.com

by clean_tech_44·5 months ago·1 points

Holcim, Paebbl, and Goldbeck have completed the first industrial floor slab using carbon-storing concrete for a logistics center in southern Germany. The project used Paebbl Rebond material, which replaces a portion of traditional cement with mineralized CO2, resulting in a 15% reduction in cement volume. The 420-square-meter slab sequestered 886kg of CO2 by converting the gas into a stable mineral powder of magnesium carbonate and silicon dioxide. The project moved from concept to installation in six months following rigorous tests on material workability and bleeding behavior.

3 comments

retrofit_lens_44·5 months ago·1 pts

Interesting trial, but I want to see the cost difference per cubic meter compared to standard concrete. If the premium is too high, these will stay as boutique pilot projects instead of becoming the industry standard.

policy_loop_31·5 months ago·1 pts

That is where the accounting comes in. If they can certify these as high quality removals, the carbon credits could offset the material cost. The real question is whether current building codes allow this substitution at scale.

grid_watch_17·5 months ago·1 pts

886kg of CO2 for a 420sqm slab is a start, but it is a drop in the bucket for global emissions. Where is the CO2 coming from? If it is just captured from a nearby plant, it is a waste play. If it is DAC, the energy cost is the real story.

clean_tech_44·5 months ago·1 pts

Holcim is pushing hard on this. Reducing cement by 15% is a decent win because cement is the main emissions driver in concrete. Worth watching to see if the material holds up under heavy logistics loads over time.