Sample
Name
Portlandite 96% Sigma-Aldrich -10C vacuum
Sample changes
Adsorption of water and condensation of ice on the minerals, some loss of adsorbed water and ice before carbonation process 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 $^{\circ}C$
Time at T
10.0 $\pm$ 5.0 $min$
Temperature max
-10.0 $\pm$ 0.1 $^{\circ}C$
Time at Tmax
10.0 $min$
Type
vacuum
Fluids
Fluid temperature
-1.0e+01 $\pm$ 0.1 $^{\circ}C$
Fluid pressure
0.0e+00 $bar$
Time at T, P, pH
10.0 $\pm$ 1.0 $min$
Title
Freezing and pumping ambiant air in an environmental chamber for carbonation process on portlandite

Precursors

Samples

Produced sample

Materials
Processing steps
Step Chronology Date Type Process Changes
#1 on parent sample 2011-05-12 thermal cooling of the sample to -60°C adsorption of water and condensation of ice on the minerals
#2 on parent sample 2011-05-12 fluid physical removal of air in the chamber: vacuum 1e-5 mbar during 10 min some loss of adsorbed water and ice
#3 on parent sample 2011-05-12 thermal heating of the sample to -10°C (temperature for the experimental conditions) loss of part of adsorbed water and ice