Permeability in sands and gravels can help determine the drainage and porosity characteristics of materials
This information aids in asphalt pavement design and placement
The Permeameter conforms to ASTM D2434 for determining permeability of soils, sands & gravels by the constant head method
Required equipment consists of a Permeameter, and a manometer panel to measure the flow-rate of water, a constant head tank to provide the water source, along with a stopwatch
The inside of the cylinder at each port is machined out & lined with a #100 mesh stainless steel screen to prevent outward migration of fines during the test
A spring inside the top is used to apply between 5-10 pounds of force against the top sample porous stone or screen preventing material density changes during the test
