Accelerated curing of cementitious systems by carbon dioxide Part II. Hydraulic calcium silicates and aluminates

The treatment of Ca₃SiO₅, β-Ca₂SiO₄, Ca₃Al₂O₆ and Ca₁₂Al₁₄O₃₃ low water/solids ratio compacted pastes with carbon dioxide immediately after preparation resulted in a rapid strength development of the calcium silicates and a negligible strength development of the calcium aluminates. The strength gain after 5 minutes of carbon dioxide treatment was over 3000 psi for both the Ca₃SiO₅ and β-Ca₂SiO₄ pastes. There was no apparent difference between the rate of reaction of the Ca₃SiO₅ and β-Ca₂SiO₄ pastes as based on strength gain characteristics.