GRADIENT RATIO TEST APPARATUS - (ASTM D 5101)-

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

1. Soil‑Geotextile Permeameter (three‑piece acrylic chamber unit) ‑ 100mm
2. Two Constant Water Head Devices, one mounted on a jack stand (adjustable) and one stationary ‑ Fig. 3 of ASTM D5101
3. Soil Leveling Device
4. 3-Piece Acrylic Chamber design
5. Stainless steel clamping rods and sturdy base
6. Six manometer ports of parallel glass tubes and measuring rulers, with algae-inhibiting mesh discs
7. Anodized top and bottom caps with vent valves
8. Two Stainless Steel Support Screens of 5 mm (No. 4) mesh
9. Two Stainless Steel Support screen of 150 μm (No. 100) mesh (Alage Inhibitor / Micro Screen)
10. 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): Price On Request
2. Graduated Cylinder, 100 ± 1 cm3 capacity: Price On Request
3. Stopwatch: Price On Request
4. Electronic Balance ‑ 2 kg x 0.1 Gram: Price On Request
5. Carbon Dioxide, (CO2), gas cylinder and regulator: Price On Request
6. Low temperature waterbath: Price On Request
7. Water De‑airing System: Price On Request
8. Soil Sample Splitter: Price On Request
9. Pan, for drying soil: Price On Request
10. Mortar and Pestle, for pulverizing soil: Price On Request