Turning CO2 Into a Building Material by Mineralization

M. Bauchy, G. Sant
University of California, Los Angeles,
United States

Keywords: concrete, carbon utilization, mineralization

Summary:

Concrete, which is by far the most manufactured material in a world, faces many challenges, including a substantial embodied carbon intensity. To mitigate the carbon footprint of concrete, we present a new carbon immobilization process based on a 3D-printable portlandite-based cementitious binder that permits CO2 uptake by mineralization. This process could greatly reduce the carbon footprint associated with traditional concrete production. In turn, by using CO2 as a resource for producing concrete, this approach could change our perception of CO2—wherein CO2 is reimagined as a resource for the production of value-added products rather than as a waste.