Virtual cross-fertilisation workshop

Boosting circularity in the process industry: Focus on industrial symbiosis between the aluminium & cement sectors - 26 September 2022




Cement-based materials are the second most used substances in the world after water. The main cement component is Portland clinker which is produced from abundant raw materials cheaply available globally, mainly limestone. The production of clinker generates about 850 kg CO2/t of clinker, corresponding to about 7% of the global total anthropogenic GHG annual emissions (ca 4% in the EU). About 60% of those emissions are process emissions, related to the limestone decarbonisation during the calcination process.

One of the main levers to deliver substantial reductions in CO2 emissions related to cement and concrete is the increased use of ‘supplementary cementitious materials’ (SCMs); these are low-CO2 substitutes with hydraulic/pozzolanic properties which can substitute Portland clinker in cement and/or concrete.

Bauxite Residue (BR) is the main by-product of alumina/aluminium production. The current BR production level in the EU is 6.8 Mtpa (million tonnes per year); while the cumulative stockpiled level is a staggering 500 Mt (dry matter). With the gradual exhaustion of space and social tolerance towards landfilling in Europe, the European alumina industry is searching for bulk applications that could absorb its BR volumes.

In this context, the development of a new symbiotic value chain between the alumina and cement producers, where the properties of BR will be modified for making it a suitable active SCM for low CO2-cement products, would be beneficial for both industries. This is the major objective of the EU ReActiv project.



This online workshop articulated in 4 sessions, is organised by European Aluminium under the ReActiv project umbrella. Its main objectives are to promote exchange and cross-fertilisation between EU projects and industry to foster new synergies to boost industrial symbiosis and to turn industrial residues (notably bauxite residue) into a resource for producing lower carbon footprint cement products.

Hence, this one-day workshop aims to:

  • address the development of new clinker and/or SCM using alternative/waste-derived material resources leading to a reduced carbon footprint of cement products
  • enhance Industrial Symbiosis (IS) within or across the industrial value chains
  • address key enablers for successful deployment of relevant innovations

The workshop will also address standardisation and policy aspects as important enablers for sustainable high-end market products with increased social acceptance.

The Workshop is freely accessible, and the deadline for registration is 22 September.

Only registered participants will have access to the workshop.


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