Reaction of Beta‐Dicalcium Silicate and Tricalcium Silicate with Carbon Dioxide and Water Vapor

摘要: The carbonation-reaction kinetics of beta-dicalcium silicate (2CaO·SiO2 or β-C2S) and tricalcium (3CaO. SiO2 C3S) powders were determined as a function material parameters reaction conditions an equation was developed which predicted the degree reaction. effect relative humidity, partial pressure CO2, surface area, temperature, time on determined. Carbonation followed decreasing-volume, diffusion-controlled kinetic model. activation energies for carbonation β-C2S C3S 16.9 9.8 kcal/mol, respectively. Aragonite principal carbonate formed during rate formation coincident with depletion calcium silicates; C-S-H gel minimal.