Bentonite pellets

Bentonite pellets are made from natural, organic free, high-swelling bentonite, they are designed for use in the groundwater monitoring industry to form a chemically resilient, highly impermeable and flexible seal. Bentonite pellets isolate screened intervals of monitoring wells and provide an excellent seal for abandoned boreholes.

Functions

  • Easy to use
  • Provide a highly impermeable well seal
  • Does not shrink or crack
  • Easy to pour to depth
  • Uniform size helps prevent bridging
  • Chemically stable.
  • Self-sealing; remain flexible when saturated and will rehydrate.

Typical Properties:

  • Permeability range: 1 x 10-7 to 1 x 10-9 cm/sec.
  • Free Swelling Volume: > 500% ( after 48 hrs)
  • Contained Swelling Volume: > 40% ( after 48 hrs)
  • Settling Velocity: 40 (cm/sec)
  • Swelling Onset: 15 minutes
  • Pelle Diameter: 8 mm
  • Pellet Lenght: 5 -15 mm
  • Bulk Density: 1,05 – 1,10 g/ml
  • Specific Gravity: 2,2 – 2,5 g/ml
  • Colour: Light Grey

Typical Chemical 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 Ingnition: 5,7
  • H20: 14-18%

Composition (By XRD Analysis)

  • Montmorillonite Clay: Major ( ca. 40%)
  • Calcite: Some
  • Feldspar: Minor
  • Alpha Quartz: Minor

Recommended:

For shallow applications, pour bentonite pellets slowly and steadily to prevent blocking and bridging.
For deep applications, bentonite pellets may be tremied into place – add bentonite pellets to the tremie pipe and quickly chase with water or air to deliver the pellets quickly and accurately to the desired depth.

Packaging:

Bentonite Pellets are packaged in 25Kg plastic bags (40 x 25Kg bags per shrink wrapped pallet).

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