Carmat is a research and development project concerning environmental technologies in collaboration with several research centres including the “CRM-ETP” technological platform. This project proposes using the CO2 present within gaseous discharge from the steel industry to manufacture marketable products from poorly-recovered metallised slag via an original carbonation process. During this study, three types of products focusing on different applications will be developed:

  • synthesis aggregates likely to replace sand in road applications;
  • large components (building blocks, interlocking paving stones) intended for the building sector;
  • large components presenting good surface quality with a view to creating pavements or terraces instead of natural stone.

To meet these objectives, the project includes the development of a pilot experimental production unit which will also be used to dimension the future industrial unit located on the Marchienne-au-Pont site. The ISSeP’s mission is to perform a global toxicological and environmental analysis in the operating pilot unit (dust emissions, management of flows of untreated slag, etc.) and this with a view to identifying risk zones and performing actions.


Continuation of studies on the environmental and health impacts on industrial processes similar to those which will be used in the context of this project.
Following the new works programme, the launch of the pilot tests is set for early 2014; it is only at this point that the “quantification and characterisation of effluents released into the environment by the pilot facility via monitoring of the tests performed” and “evaluation of risks of pollutants being transferred to underground waters and soils via run-off waters and permeation” will be carried out. The formulation of recommendations relative to storage, collection and treatment systems for run-off waters will be developed.