Geoclay produces a low‑carbon supplementary cementitious material by activating waste mining clay into metakaolin, which can replace a large share of clinker in cement mixes. The product meets European cement and concrete standards, offers early‑age strength comparable to traditional cement, and reduces mix CO₂ emissions by up to 90% while remaining cost‑neutral.
Funding
Funding not disclosed
Founders
Product
Problem
Concrete production generates most of the carbon footprint of the construction sector, with cement accounting for about 98 % of emissions. This high carbon intensity limits the industry's ability to meet climate targets and increases reliance on finite natural resources.
Solution
Geoclay offers a low‑carbon supplementary cementitious material (SCM) made from waste clay extracted in mining operations. Through a patented activation process, the clay is transformed into high‑quality metakaolin that can replace a significant portion of clinker in cement mixes. The resulting binder meets all French and European cement and concrete standards (NF EN 197‑1, 197‑5, 206+A2/CN) while delivering comparable early‑age reactivity and durability. By using locally sourced, circular‑economy feedstock and a low‑energy calcination method, Geoclay reduces CO₂ emissions of the concrete mix by up to 90 % relative to traditional cement, without increasing cost.
Target Audience
Geoclay targets cement manufacturers, ready‑mix concrete producers, and large‑scale construction firms seeking certified low‑carbon binders for infrastructure, civil engineering, and building projects across France and Europe.
Features
- Patented activation technology that converts waste mining clay into a high‑performance metakaolin binder
- Certified compliance with all relevant cement (NF EN 197‑1, 197‑5) and concrete (NF EN 206+A2/CN) standards
- Early‑age strength development comparable to conventional cement, enabling rapid construction schedules
- Natural pink hue of the product provides aesthetic options valued by architects and owners
- Competitive pricing equivalent to traditional cement, facilitating cost‑neutral adoption
- Local sourcing of raw clay and optimized transport logistics to further lower embodied carbon