GRADIENT RATIO TEST APPARATUS - (ASTM D 5101)-

GRADIENT RATIO TEST APPARATUS - (ASTM D 5101)-

Model Number : GT-108M

None


Compliance Standards

ASTM D5101


Applications

Evaluates particle retention and permeability of soil/geotextile systems. The test determines the compatibility of various types of geotextiles with cohesionless soils by measuring hydraulic gradient, system permeability, and gradient ratio. A 4in (102mm) diameter composite sample is prepared in the permeameter and tested with water in unidirectional flow.


Standard supply

  • Soil‑Geotextile Permeameter (three‑piece acrylic chamber unit) ‑ 100mm
  • Two Constant Water Head Devices, one mounted on a jack stand (adjustable) and one stationary ‑ Fig. 3 of ASTM D5101
  • Soil Leveling Device
  • 3-Piece Acrylic Chamber design
  • Stainless steel clamping rods and sturdy base
  • Six manometer ports of parallel glass tubes and measuring rulers, with algae-inhibiting mesh discs
  • Anodized top and bottom caps with vent valves
  • Two Stainless Steel Support Screens of 5 mm (No. 4) mesh
  • Two Stainless Steel Support screen of 150 μm (No. 100) mesh (Alage Inhibitor / Micro Screen)
  • Piping barriers (caulk), clamping brackets, and plastic tubing ‑ Fig. 2 of ASTM D5101


Optional accessories at extra cost (Refer to the recommended accessories list)

  1. Glass Thermometer (0 to 50 ± 1°C)
  2. Graduated Cylinder, 100 ± 1 cm3 capacity
  3. Stopwatch
  4. Electronic Balance ‑ 2 kg x 0.1 Gram
  5. Carbon Dioxide, (CO2), gas cylinder and regulator
  6. Low temperature waterbath
  7. Water De‑airing System
  8. Soil Sample Splitter
  9. Pan, for drying soil
  10. Mortar and Pestle, for pulverizing soil
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