Cement by-pass dust used to produce aggregate, from the Vicat Group Cement plant in Montalieu France, sourced by Carbon8 Systems Ltd. Produced as a by-product of cement production, particularly when the cement plant moves to alternative fuels in order to reduce their CO2 footprint.

Scientists at Carbon8 Systems have found a way to treat industrial residues, like the fine powder on display, with captured carbon dioxide.

Their ‘carbonation in a box’ technology turns the residues into aggregates – the larger granules – that are then used to make concrete. This technology can be added to existing industrial sites, so that companies can reduce their carbon dioxide emissions and avoid sending waste to landfills.

The cement by-pass dust is an alkaline residue that can be reacted with Carbon dioxide from the cement fuel stack to manufacture an aggregate product for use in concrete blocks, thereby permanently capturing the CO2.