Electric recycling of Portland cement at scale.

ABSTRACT: Cement production causes 7.5% of global anthropogenic CO₂ emissions, arising from limestone decarbonation and fossil-fuel combustion^1-3. Current decarbonation strategies include substituting Portland clinker with supplementary materials, but these mainly arise in emitting processes, developing alternative binders but none yet promises scale, or adopting carbon capture and storage that still releases some emissions^4-8. However, used cement is potentially an abundant, decarbonated feedstock. Here we show that recovered cement paste can be reclinkered if used as a partial substitute for the lime-dolomite flux used in steel recycling nowadays. The resulting slag can meet existing specifications for Portland clinker and can be blended effectively with calcined c

SUBMITTER: Dunant CF 

PROVIDER: S-EPMC11136652 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature