ReActiv: converting bauxite residue into upcycled SCMs

The ReActiv project converts bauxite residue, an aluminium industry liability, into valuable SCMs for cement decarbonisation, enabling production of EN 197-1 42,5 N or R cement with minimum 30 per cent clinker substitution. While challenges persist, Holcim’s co-ordination has fostered a circular economy for a net-zero future. By Philippe Bénard and Frédérique Ferey, Holcim Innovation Center, France