ASTM-D4491 › Standard Test Methods for Water Permeability of Geotextiles by Permittivity
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1.1 These test methods provide procedures for determining the hydraulic conductivity (water permeability) of geotextiles in terms of permittivity under standard testing conditions, in the uncompressed state. Included are two procedures: the constant head method and the falling head method.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units stated in parentheses are provided for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Constant head testing; Drainage; Falling head test; Flow and flow rate; Geosynthet; Hydraulic conductivity; Liquids; Penetration; Permeability; Permittivity method; Water; ICS Number Code 59.080.70 (Geotextiles)
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Sept. 11, 2020