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> Unfortunately about 60% of CO2 emissions from cement production is simply the CO2 released from the conversion of Calcium Carbonate (CaCO3) to lime (CaO). Is
by pengaru 5y ago
> Unfortunately about 60% of CO2 emissions from cement production is simply the CO2 released from the conversion of Calcium Carbonate (CaCO3) to lime (CaO).
Isn't this irrelevant?
It's not like we just produce cement to stockpile it indefinitely. When it's mixed with water and used to construct useful things, that CO2 comes back out of the atmosphere as it "cures".
What am I missing here?
- jjk166 5y agoCement curing only absorbs about 30% of the CO2 released. The cement doesn't turn 100% back into calcium carbonate. Only the surface of the grains get exposed to the water and CO2 necessary to cure.