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. One September day, it started to snow inside MIT’s Pierce Laboratory. Researchers depressurized a tank of liquid carbon dioxide (CO2), instantly freezing it and releasing solid flakes. These were blended into cement paste and pressed into discs rough... [6551 chars]
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