A method for curing cementitious articles, the method comprising: providing a cementitious article formed from a mixture of a cement binder, aggregate, and water, the cement binder comprising Ca 3 SiO 5; placing the cementitious article in a curing chamber; maintaining a curing relative humidity between about 40% and about 80% within the curing chamber; maintaining a curing temperature between about 50°C and about 80°C within the curing chamber; curing the cementitious article by flowing a mixture of dry steam and CO 2 into the curing chamber while maintaining the curing relative humidity and the curing temperature for a duration between about 4 hours and about 24 hours, wherein a concentration of CO 2 in the mixture of dry steam and CO 2 is between about 2.5% and about 20.0%, by volume, Ca 2 is formed by at least one of the reactions 2Ca 3 SiO 5 (s) + 7H 2 O(l) →- 3CaO·2SiO 2 ·4H 2 O(s) + 3Ca 2 (s), and 2Ca 3 SiO 5 (s) + 7H 2 O(g) →- 3CaO·2SiO 2 ·4H 2 O(s) + 3Ca 2 (s), CO 2 from the mixture of dry steam and CO 2 reacts with the cementitious article to form CaCO 3 in the cementitious article by at least one of the reactions 2Ca 3 SiO 5 (s) + 3 CO 2 (g) + 4 H 2 O(l) →- 3CaO·2SiO 2 ·4H 2 O(s) + 3CaCO 3 (s), and Ca 2 (s) + CO 2 (g) →- CaCO 3 (s) + H 2 O(l), and the cured cementitious article comprises a CO 2 uptake equal to or greater than 15%, by weight. providing a cementitious article formed from a mixture of a cement binder, aggregate, and water, the cement binder comprising Ca 3 SiO 5; placing the cementitious article in a curing chamber; maintaining a curing relative humidity between about 40% and about 80% within the curing chamber; maintaining a curing temperature between about 50°C and about 80°C within the curing chamber; curing the cementitious article by flowing a mixture of dry steam and CO 2 into the curing chamber while maintaining the curing relative humidity and the curing temperature for a duration between about 4 hours and about 24 hours, wherein a concentration of CO 2 in the mixture of dry steam and CO 2 is between about 2.5% and about 20.0%, by volume, Ca 2 is formed by at least one of the reactions 2Ca 3 SiO 5 (s) + 7H 2 O(l) →- 3CaO·2SiO 2 ·4H 2 O(s) + 3Ca 2 (s), and 2Ca 3 SiO 5 (s) + 7H 2 O(g) →- 3CaO·2SiO 2 ·4H 2 O(s) + 3Ca 2 (s), CO 2 from the mixture of dry steam and CO 2 reacts with the cementitious article to form CaCO 3 in the cementitious article by at least one of the reactions 2Ca 3 SiO 5 (s) + 3 CO 2 (g) + 4 H 2 O(l) →- 3CaO·2SiO 2 ·4H 2 O(s) + 3CaCO 3 (s), and Ca 2 (s) + CO 2 (g) →- CaCO 3 (s) + H 2 O(l), and the cured cementitious article comprises a CO 2 uptake equal to or greater than 15%, by weight. a concentration of CO 2 in the mixture of dry steam and CO 2 is between about 2.5% and about 20.0%, by volume, Ca 2 is formed by at least one of the reactions 2Ca 3 SiO 5 (s) + 7H 2 O(l) →- 3CaO·2SiO 2 ·4H 2 O(s) + 3Ca 2 (s), and 2Ca 3 SiO 5 (s) + 7H 2 O(g) →- 3CaO·2SiO 2 ·4H 2 O(s) + 3Ca 2 (s), CO 2 from the mixture of dry steam and CO 2 reacts with the cementitious article to form CaCO 3 in the cementitious article by at least one of the reactions 2Ca 3 SiO 5 (s) + 3 CO 2 (g) + 4 H 2 O(l) →- 3CaO·2SiO 2 ·4H 2 O(s) + 3CaCO 3 (s), and Ca 2 (s) + CO 2 (g) →- CaCO 3 (s) + H 2 O(l), and the cured cementitious article comprises a CO 2 uptake equal to or greater than 15%, by weight.