Systems and processes for accelerated carbonation curing of pre-cast cementitious structures

A process for accelerated carbonation curing of a pre-cast cementitious structure, the process comprising:

• producing a greater-pressure steam,
• passing the greater-pressure steam through an ejector having a vacuum chamber in fluid communication with a carbon dioxide source to receive a lesser-pressure carbon dioxide containing stream, the lesser-pressure carbon dioxide containing stream having a pressure less than a pressure of the greater-pressure steam, where passing the greater-pressure steam through the ejector combines the lesser-pressure carbon dioxide containing stream with the greater-pres sure steam to produce a mixed stream comprising at least steam and carbon dioxide and having a pressure greater than a pressure of the lesser-pressure carbon dioxide containing stream;
• and
• contacting the mixed stream with a pre-cast cementitious structure to conduct the accelerated carbonation curing of the pre-cast cementitious structure.