ASTM D 4491 : 1999 : REV A : R2004

1 Scope
2 Referenced documents
3 Terminology
4 Summary of test methods
5 Significance and use
6 Apparatus
7 Sampling
8 Test water preparation
9 Specimen preparation
10 Operator process control
CONSTANT HEAD TEST
11 Procedure
12 Calculation
FALLING HEAD TEST
13 Procedure
14 Calculation
15 Report
16 Precision and bias
17 Keywords

CONTAINED IN VOL. 04.13, 2015 Defines procedures for determining the hydraulic conductivity (water permeability) of geotextiles in terms of permittivity under standard testing conditions, in the uncompressed state.

1.1 These test methods cover 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.

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.