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A shot of carbon dioxide rewires how cement sets | Injecting CO2 into cement products like concrete is one way to store it and keep it out of the atmosphere. But until now, the underlying cement chemistry hadn't been directly visualized.

MIT's Concrete Sustainability Hub used Raman spectroscopy to reveal how CO₂ injection — in collaboration with CarbonCure — triggers a silica gel intermediate that reshapes the cement matrix into a stronger calcium silicate hydrate network.

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