Utvikling av lavkarbon bindemidler fra bunnaske og industrielt slagg til bygg

Offentlig prosjektsammendrag

As the supply of coal-based fly ash is diminishing, there is a growing need for alternative SCMs. Lindum aims to valorise waste streams currently landfilled, moving them higher up the waste hierarchy. This project seeks to develop a low-carbon construction material by partially replacing cement with a blend of IBA and metallurgical slag. Currently unused in Norway, these residues contain mineral compositions suitable as SCMs but require preprocessing to address aluminium, alkali salts, and heavy metals. By combining the two fractions, the mix is expected to improve material performance, reduce heavy metal leaching, and balance pH and alkali content. The project will generate a knowledge base for optimising slag and bottom ash treatment and preprocessing requirements, with the goal of delivering a commercially viable SCM product for cement and construction applications, supporting CO₂ reduction and circular economy initiatives.