Sample
Name
Portlandite 96% Sigma-Aldrich -10C 2b CO2 300min
Sample changes
Formation of carbonates and reduction of portlandite proportion
Substrate material
KBr window, 3mm thickness, 12mm diameter
Comments
dispersion of agglomerate grains on the substrate
Temperature
-10.0 $\pm$ 0.1 $C$
Time at T
310.0 $\pm$ 1.0 $min$
Temperature max
-10.0 $\pm$ 0.1 $C$
Time at Tmax
310.0 $min$
Pressure
2.0 $\pm$ 0.1 $bar$
Pressure max
2.0 $bar$
Type
molecular gas
Fluids
Fluid temperature
-10.0 $\pm$ 0.1 $C$
Fluid pressure
2.0 $\pm$ 0.1 $bar$
Time at T, P, pH
300.0 $\pm$ 1.0 $min$
Title
Carbonation process of portlandite with 2 bar of CO2 gas at -10°C during 300 min

Precursors

Produced sample

Materials
Processing steps
Step Chronology Date Type Process Changes
#1 on parent sample 2011-05-12 chemical 2 bar of CO2 gas in contact with sample during 300 min at -10°C carbonation process, decrease of mass fraction of Portlandite, increase of mass fraction of Calcite and Aragonite. Reaction: CO2 + Ca(OH)2 => CaCO3 + H2O