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  • Triaxial Shear Strength
  • Consolidation
  • Unconfined Compressive Strength
  • Direct Shear Strength
  • Permeability
  • California Bearing Ratio (CBR)
  • Geotextile Testing
  • Proctor Compaction / Classification
  • Soil-Cement
  • Load & Displacement Measurement
  • Load Frames
  • Latex Membranes
  • Porous Stones
  • Data Acquisition Software
  • Sample Preparation
  • Aggregates
  • Asphalt
  • Sieve Analysis
  • About Us
  • Contact us
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    • Home /
    • Soils /
    • Permeability /
    • Double-Ring Permeameters
    Double-Ring Permeameters
    Double-Ring Permeameter

    Double-Ring Permeameters

    Meets Standard(s)
    • ASTM D5856
    Double-Ring PermeametersDouble-Ring Permeameters
    4in Double-Ring Permeameter

    4in Double-Ring Permeameter

    3850
    $450.00
    4in Double-Ring Permeameter w/ Mold & Collar

    4in Double-Ring Permeameter w/ Mold & Collar

    3851
    $540.50
    • Description
    • Specifications
    • Questions?

    Double-Ring Permeameters test permeability of soil compacted in a conventional 4in (102mm) soil compaction (Proctor) mold. A special Double-Ring Permeameter base has a stainless steel ring dividing the sample into two equal portions. The mold is secured between top and bottom plates with threaded tie rods and clamp knobs. Water is introduced through the top plate valve. The double-ring method is preferred in ASTM D5856 because it can identify erroneous measurements caused by side-wall leakage. Both units can be used with constant head or falling head methods.

    Double-Ring Permeameters come with three porous stones, one of which is donut-shaped for containing the outer perimeter of the sample. There are also three valves for controlling water flow both in and out of the sample. Model 3851 also includes a mold and collar. Flow through the center and perimeter of the sample is monitored using two pipettes (2cc capacity) that connect to the lower control valves. The unit requires a Constant Head Tank for constant head permeability tests or a Single Tube Manometer for falling head tests.

    Features:

    • Preferred method for ASTM D5856 test procedure
    • Can be used for either constant head or falling head methods
    • Available with or without 4in soil compaction mold

    Included Items:

    • 4in Double-Ring Permeameter or
      4in Double-Ring Permeameter w/ Mold & Collar
    • Three Porous Stones
    • Two 2cc Pipettes
    • Upper and Lower Plates with Valves and Fittings

    Accessories:

    • Constant Head Tanks are necessary to maintain constant water head
    • Single Tube Manometers are required to perform falling head tests
    • 3872B 1.5gal (5.7L) Deairing Tank w/ Valves, Fittings & Lines regulates the flow of deaired water into the permeameter
    Estimated Shipping Weight 12.0lb (5.44kg)

    Please enter your questions/comments and contact information below. A Karol-Warner customer service representative will respond during business hours (8am - 5pm EST, Monday through Friday).

    Accessories
    1,000cc Constant Head Tank

    Constant Head Tanks

    From $196.00
    Single Tube Manometer

    Single Tube Manometers

    From $139.00
    1.5gal (5.7L) Deairing Tank with Valves, Fittings & Lines

    1.5gal (5.7L) Deairing Tank w/ Valves, Fittings & Lines

    $480.00
     
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