Carbstone

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Carbstone is a Belgian manufacturer of building materials based in Genk, Limburg. The company specializes in CO2-negative and circular construction products, utilizing a patented carbonation technology that transforms steel industry slag into high-strength materials. This innovative process captures and stores CO₂, making Carbstone's products carbon-negative and significantly reducing curing time to just 24 hours. The product range includes 100% recyclable masonry blocks, precast walls, tiles, paving bricks, and kerb stones, all made without cement. Carbstone operates two production sites in Belgium, with a daily output of approximately 70 tonnes of CO₂-bound building blocks. The company is recognized for its commitment to sustainability, being the first to achieve 100% circular and CO2-negative building materials according to official standards. Carbstone actively collaborates on projects aimed at advancing circular economy solutions in construction.