Carbon sink concrete - from potential to tonnes of CO2 equivalent in thousands

Important results from the project

The project largely achieved its goals. A complete process – from biogenic raw material through pyrolysis to CE-marked products – was developed. Three EPDs were produced, a patent application submitted, and a new brand launched. The project also included market introduction of several products, a Nordbygg price nomination ("Guldmedaljen") for Finja’s Murblock Bas Eco, and the invention of a new material – Carbon Composite – for cement replacement in concrete and building products.

Expected long term effects

The project has laid the foundation for large-scale carbon sinks in cement-based building products and concrete in Sweden. The technology establishes a model for verifiable carbon sinks in buildings, with potential to expand to carbon from various sources (e.g. Bio-CCS). The carbon composite developed by Nordiczero can help reduce cement use in building products and concrete. Overall, the project supports the construction sector’s long-term contribution to Sweden’s climate targets.

Approach and implementation

The project was carried out in five mainly technical work packages aiming to develop suitable biochar quality for construction products and concrete, as well as the required technology and know-how for large-scale production. A market mapping of existing biochar was conducted along with extensive product development. The timeline was extended due to challenges in installing the pilot pyrolysis unit and because the pyrolysis trials were the first of their kind in Sweden.