Active Standard: D4491 - 99a(2014)e1
The procedure for determining the water permittivity of geotextiles using air as the fluid and a standard porometer(D6767)as the test apparatus, has been incorporated into the standard. The complete air test procedure, including all of the necessary details, are included. The change to the title of the test method will also be balloted.
Keywordsconstant head; falling head; geotextiles; permeability; permittivity; Constant head testing; Drainage materials/systems; Falling head test; Flow and flow rate--soil/rock/related materials; Geosynthetics; Hydraulic conductivity/transmissivity; Liquids--geosynthetic/geothermal applications; Penetration--soil; Permeability--geosynthetics; Permittivity method; Water analysis; Water penetration;
Draft Under Development