Jiaying Pan

Carbonation curing can store CO₂ in cementitious materials, but its net benefit depends on emissions from CO₂ supply and curing. A curated set of 461 literature uptake records, harmonised to an original-material mass basis including aggregates, is paired with eight material and curing descriptors and eight compared regressors, then coupled to supply, transport and curing emissions. At an illustrative predicted uptake of 0.231 kg CO₂/kg original material and an assumed 2400 kg/m³ material mass, all five supply scenarios give net benefits of 0.189–0.219 kg CO₂/kg original material at 0.05 kg CO₂/kWh, two turn net emitters at 0.40 kg CO₂/kWh, and break-even electricity intensities range from 0.314 to 2.047 kg CO₂/kWh.

Carbonation curing can store CO₂ in cementitious materials, but its net benefit depends on emissions from CO₂ supply and curing. A curated set of 461 literature uptake records, harmonised to an original-material mass basis including aggregates, is paired with eight material and curing descriptors and eight compared regressors, then coupled to supply, transport and curing emissions. At an illustrative predicted uptake of 0.231 kg CO₂/kg original material and an assumed 2400 kg/m³ material mass, all five supply scenarios give net benefits of 0.189–0.219 kg CO₂/kg original material at 0.05 kg CO₂/kWh, two turn net emitters at 0.40 kg CO₂/kWh, and break-even electricity intensities range from 0.314 to 2.047 kg CO₂/kWh.