Macromin Kentish Minerals

KM Bentonite Granules

Key Facts

  • After wetting ("hydration") with fresh water swells to > 150% of original volume.
  • Supplied in 20kg or 25 kg plastic sacks.
  • For large jobs supplied in 1-tonne big bags or loose in 20 or 30 tonne tipper trucks.
  • Mostly sun-dried
KM Bentonite Granules

Technical Description

Typical Analysis % :

  • SiO2 - 65.3
  • Al2O3 - 11.7
  • Fe2O3 - 6.36
  • TiO2 - 0.63
  • CaO - 1.01
  • MgO - 3.35
  • K2O - 1.70
  • Na2O - 4.90
  • Loss On Ignition - 5.7

Composition (By XRD Analysis) :

  • Montmorillonite Clay - Major  (ca. 65 % )
  • Calcite - Some
  • Feldspar - Minor
  • Alpha Quartz - Minor

Particle Size, Density & Colour:

  • Passing 6 mm - 97 %
  • Passing 4.75 mm - 80 %
  • Passing 1.0 mm - 6 %
  • Passing 0.5 mm - 1 %
  • Bulk Density - 1.05 -1.10 g / ml
  • Specific Gravity - 2.2 – 2.5   g / ml
  • Colour - Light Grey

Typical Performance Characteristics :

  • Free Swelling Volume  > 500% (after 48 hrs)
  • Contained Swelling Volume > 70%   (after 48 hrs)