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Constant Head Permeameter ASTM/AASHTO 2.5in
Standards Supported: ASTM D2434, BS 1377 PART 5
This permeameter is designed to determine the coefficient of permeability using the constant head method for laminar water flow through granular soils. It features two grooved and screened manometer ports, with the port spacing equal to the cylinder diameter. A 100-mesh stainless steel screen prevents material migration through valves and tubing during testing. The acrylic chamber allows clear sample viewing, while a spring in the top cap applies 5-10 lbs. of force to maintain soil density. The end caps and clamping ring are made from durable anodized aluminum. Each unit comes with valves and perforated screens, with tubing sold separately.
Key Features:
- Measures permeability in sands and gravels to analyze drainage and porosity properties.
- Provides critical data for asphalt pavement design and placement.
- Conforms to ASTM D2434 standards for constant head permeability testing.
- Includes a permeameter, manometer panel for flow rate measurement, constant head water tank, and stopwatch (tubing sold separately).
- Machined ports with 100-mesh stainless steel screens prevent the migration of fines during testing.
- Spring-loaded top cap applies 5-10 lbs. of force to maintain material density during the test.