3 ms·
Afaik the way cement works is you separate carbon from stone during its production and it binds co2 from air during setting. So wheres the big impact?
by realandreskytt 8y ago
Afaik the way cement works is you separate carbon from stone during its production and it binds co2 from air during setting. So wheres the big impact?
- NegativeLatency 8y agoThe “separate carbon from stone” step is not 100% efficient
- mchannon 8y agoIt doesn't bind CO2 from air during setting- that's the disconnect. By converting the carbonate to oxide, the calcium in cement is free to bond with silicates (and to a lesser extent other compounds). That CO2 released during manufacture is now looking for a new home, which could either be a plant, or a weathering deposit of limestone which could use the CO2 in the air to convert its own carbonate to stable bicarbonate.
- dzhiurgis 8y agoAt some point it must be cheaper to just cut a massive piece of rock and ship it to the construction site, isn't it?
- Gibbon1 8y agoI've wondered about that of late. Assuming that fitting stone work was is a skilled craft. But with modern CNC technologies might be worth a look again.
- HeyLaughingBoy 8y agoDepends. Are you taking into account reconfiguring bridges and overpasses to make the loads fit, or factoring traffic management costs into the equation? The truckloads of concrete to make a structure individually take up a lot less space and weigh less than the final structure itself.