[BruceM]

https://link.springer.com/article/10.1007/s41024-016-0010-9 is a pretty nice discussion of concrete carbonation as well.

It is also worth pointing out that the GP's comment was showing the chemistry for a lime-based concrete. OPC (Ordinary Portland Cement) based concrete is substantially different in terms of the chemistry and the amount of energy involved in the manufacturing process (due to the increased amount of energy involved in producing the clinker).