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Table 7 Conditional rate constants for the cement phases estimated from fits of the solution composition and anhydrous cement composition for each experiment.

From: Experimental Study of Cement - Sandstone/Shale - Brine - CO2Interactions

Phase Experiment log k (mol/s/mol-mineral)
Anhydrite aCement:Brine -6.2
  bCement:Brine -7.3
  Sandstone ± cement -6.3
  Shale ± cement -6.9
Hydrogarnet-Fe aCement:Brine -6.2
  bCement:Brine -7.3
  Sandstone ± cement -6.3
  Shale ± cement -6.9
Hydrotalcite aCement:Brine -5.5
  bCement:Brine -6.6
  Sandstone ± cement -5.6
  Shale ± cement -6.2
Brucite aCement:Brine -5.5
  bCement:Brine -6.6
  Sandstone ± cement -5.6
  Shale ± cement -6.2
Portlandite aCement:Brine -5.5
  bCement:Brine -6.6
  Sandstone ± cement -5.6
  Shale ± cement -6.2
Pseudowollastonite aCement:Brine -6.2
  bCement:Brine -7.3
  Sandstone ± cement -6.3
  Shale ± cement -6.9
Amorphous Fe(OH)3 Sandstone -8.6
Calcite bCement:Brine -8.0
Calcite Shale ± cement -7.0
FeCO3 Shale ± cement -10.0
  1. The range in values reflects incomplete hydration and diffusion-controlled transport. aCement:Brine refers to experiment GBCO2_1 and bCement:Brine refers to experiment GBCO2_2.