Constant Head Permeameter ASTM/AASHTO 6in

Constant Head Permeameter ASTM/AASHTO 6in

Standards Supported: ASTM D2434, BS 1377 Part 5

Key Features:

• Measures permeability in sands and gravels to assess drainage and porosity characteristics, aiding in asphalt pavement design and placement.
• Complies with ASTM D2434 to determine soil, sand, and gravel permeability using the constant head method.
• Requires a Permeameter, manometer panel (to measure water flow rate), constant head tank (for water supply), and a stopwatch.
• Cylinder ports are machined and lined with #100 mesh stainless steel screens to prevent outward migration of fines during testing.
• A spring in the top cap applies 5–10 lbs. of force to maintain material density by securing the porous stone or screen.

Used to determine the coefficient of permeability via the constant head method for laminar water flow through granular soils. Features include two grooved and screened manometer ports (distance between ports equals the cylinder diameter), 100 mesh screens to prevent material migration, and an acrylic chamber for sample visibility. The spring-loaded top cap ensures consistent density, while anodized aluminum end caps and clamping rings provide durability. Each cell includes valves and perforated screens. Tubing sold separately.