Holcim, in partnership with architect Alejandro Aravena and his firm ELEMENTAL, has launched a new biochar-based concrete designed to reduce carbon emissions in construction. Unveiled at the 2025 Architecture Biennale in Venice, this innovation is featured in a prototype Basic Services Unit that demonstrates its practical application.

The new concrete incorporates biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More, a stable, charcoal-like material produced from organic matter. Instead of decomposing and releasing CO₂, this matter is converted into biochar, permanently storing carbon. Each kilogram of biochar used prevents up to three kilograms of CO₂ emissions. Combined with Holcim’s low-carbon cement and 100% recycled aggregates, this solution aligns with the company’s circular construction initiatives.

ELEMENTAL’s prototype follows an incremental design approach, using precast panels to provide essential housing infrastructure quickly and efficiently. This model addresses the growing housing demand without increasing environmental impact. According to Aravena, the approach offers scalable solutions to meet urgent housing needs while minimizing carbon emissions.

Holcim’s CEO, Miljan Gutovic, emphasized that this partnership demonstrates the company’s commitment to sustainable construction. The biochar concrete complements Holcim’s broader portfolio of sustainability-focused materials, including ECOPact, ECOPlanet, and ECOCycle® technologies.

This development represents a practical step toward reducing the environmental footprint of the construction industry while addressing global housing challenges.