Properties of Cementitious Composites Produced using Supercritical Carbon Dioxide

摘要

Supercritical fluids close to their critical point have density and thus dissolving power comparable to that of a liquid, are much more compressible than dilute gas, and have transport properties intermediate between those of gases and liquids [1].In the case of carbon dioxide, the fluid reaches the critical point at a pressure of 73.8 bar and a temperature of 31.1°C. Above these temperature and pressure, the fluid enters the supercritical state [1]. Carbon dioxide in this form - scCO2 - has the reactive and dissolving power of a liquid, but can access the small pores like a gas.^