1. Scope1.1 These test methods cove

1. Scope
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.
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.
2. Referenced Documents
2.1 ASTM Standards:
D 123 Terminology Relating to Textiles2
D 653 Terminology Relating to Soil, Rock, and Contained
Fluids3
D 4439 Terminology for Geosynthetics4
D 5199 Test Method for Measuring Nominal Thickness of
Geotextiles and Geomembranes4
E 691 Practice for Conducting An Interlaboratory Study To
Determine The Precision of a Test Method5
3. Terminology
3.1 Definitions:
3.1.1 geotechnics, n—the application of scientific methods
and engineering principles to the acquisition, interpretation,
and use of knowledge of materials of the earth’s crust to the
solution of engineering problems.
3.1.1.1 Discussion—Geotechnics embraces the fields of soil
mechanics, rock mechanics, and many of the engineering
aspects of geology, geophysics, hydrology, and related sciences.