Steel waste recycled into new construction materials

In October 2014, Belgian company Recoval opened a pilot installation to create construction materials from carbon dioxide and steel slag, a waste product of the steel industry. VITO helped create this innovative technology.  

Located in Farciennes, in the east of the Hainaut province in Belgium, Recoval is an international player in the field of processing and valorising waste from the steel industry. An intense collaboration with VITO, the academic world and a few independent experts resulted in this innovative patented technology to process steel slag. 

With this technology, Recoval presents a first on the global market: carbstone, a robust construction material created by treating steel slag (waste products from the steel industry) with carbon dioxide. During production, no concrete is used. The construction materials can be compared to a kind of hard limestone, stronger than concrete. Not only does it encapsulate carbon dioxide, but the process also uses less energy and carbon dioxide than the production of classic bricks. The new production method using carbon dioxide can easily be applied to other waste streams.  

 

VITO's role

VITO provides independent technological expertise on the valorisation of industrial waste and was instrumental in the development of the technology. VITO was able to use its own advanced testing facilities to this end. 

CARMAT in figures
  • Launched: October 2014 
  • Total budget: €10,800,000 
  • Grants from the Walloon Region and the Marshall plan
An intense collaboration with VITO, the academic world and a few independent experts resulted in this innovative patented technology to process steel slag.