‘Absolute miracle’ breakthrough provides recipe for zero-carbon cement

Photo caption: Old concrete can be recycled in furnaces used to recycle steel, in a new method that drastically reduces the CO2 emissions of both. Image courtesy of Cambridge University. Article by Michael Irving. New Atlas – May 23, 2024. Research article: Nature. Source: Cambridge University.

Concrete and steel production are major sources of CO2 emissions, but a new solution from Cambridge could recycle both at the same time. Throwing old concrete into steel-processing furnaces not only purifies iron but produces “reactivated cement” as a byproduct. If done using renewable energy, the process could make for completely carbon-zero cement. […]

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 Video: The world’s first process for making zero emissions cement – Cambridge University.