ASTM D4716-03
(Test Method)Test Method for Determining the (In-plane) Flow Rate per Unit Width and Hydraulic Transmissivity of a Geosynthetic Using a Constant Head
Test Method for Determining the (In-plane) Flow Rate per Unit Width and Hydraulic Transmissivity of a Geosynthetic Using a Constant Head
SCOPE
1.1 This test method covers the procedure for determining the flow rate per unit width within the manufactured plane of geosynthetics under varying normal compressive stresses and a constant head. The test is intended primarily as an index test but can be used also as a performance test when the hydraulic gradients and specimen contact surfaces are selected by the user to model anticipated field conditions.
1.2 This test method is limited to geosynthetics that allow continuous in-plane flow paths to occur parallel to the intended direction of flow.
1.3 The values stated in SI units are to be regarded as the standard. The values stated in parentheses are provided for information only.
1.4 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.
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Designation: D 4716 – 03
Test Method for
Determining the (In-plane) Flow Rate per Unit Width and
Hydraulic Transmissivity of a Geosynthetic Using a
1
Constant Head
This standard is issued under the fixed designation D4716; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 geocomposite, n—a product fabricated from any com-
bination of geosynthetics with geotechnical materials or other
1.1 This test method covers the procedure for determining
synthetics which is used in a geotechnical application.
the flow rate per unit width within the manufactured plane of
(D 4439)
geosyntheticsundervaryingnormalcompressivestressesanda
3.1.2 geonet, n—a geosynthetic consisting of integrally
constant head. The test is intended primarily as an index test
connected parallel sets of ribs overlying similar sets at various
but can be used also as a performance test when the hydraulic
angles for planar drainage of liquids or gases. (D 4439)
gradients and specimen contact surfaces are selected by the
3.1.3 geosynthetic, n—a planar product manufactured from
user to model anticipated field conditions.
polymeric material used with soil, rock, earth, or other geo-
1.2 This test method is limited to geosynthetics that allow
technical engineering related material as an integral part of a
continuousin-planeflowpathstooccurparalleltotheintended
man-made project, structure, or system. (D 4439)
direction of flow.
3.1.4 geotechnics, n—the application of scientific methods
1.3 The values stated in SI units are to be regarded as the
and engineering principals to the acquisition, interpretation,
standard. The values stated in parentheses are provided for
and use of knowledge of material of the earth’s crust to the
information only.
solution of engineering problems.
1.4 This standard does not purport to address all of the
3.1.4.1 Discussion—Geotechnicsembracesthefieldsofsoil
safety concerns, if any, associated with its use. It is the
mechanics, rock mechanics, and many of the engineering
responsibility of the user of this standard to establish appro-
aspects of geology, geophysics, hydrology, and related sci-
priate safety and health practices and determine the applica-
ences. (D 4439)
bility of regulatory limitations prior to use.
3.1.5 geotextile, n—a permeable geosynthetic comprised
2. Referenced Documents solely of textiles. (D 4439)
2
3.1.6 gravity flow, n—flow in a direction parallel to the
2.1 ASTM Standards:
planeofageosyntheticdrivenpredominantlybyadifferencein
D4354 Practice for Sampling of Geosynthetics for Testing
elevation between the inlet and outflow points of a specimen.
D4439 Terminology for Geosynthetics
3.1.6.1 Discussion—The pressure at the outflow is consid-
D4491 Test Methods forWater Permeability of Geotextiles
ered to be atmospheric. (D 4439)
by Permittivity
3.1.7 head (static), n—theheightaboveastandarddatumof
D6574 Test Method for Determining the In-Plane Hydrau-
the surface of a column of water (or other liquid) that can be
lic Transmissivity of a Geosynthetic by Radial Flow
supported by a static pressure at a given point. The static head
3. Terminology
is the sum of the elevation head and the pressure head.
(D 5092)
3.1 Definitions:
3.1.8 hydraulic gradient, i, n—the loss of hydraulic head
per unit distance of flow, dh/dL. (D 4439)
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2 −1
This test method is under the jurisdiction of ASTM Committee D35 on
3.1.9 hydraulic transmissivity, u (L T ), n—for a geosyn-
GeosyntheticsandisthedirectresponsibilityofSubcommitteeD35.03onHydraulic
thetic, the volumetric flow rate per unit width of specimen per
Properties.
unit gradient in a direction parallel to the plane of the
Current edition approved Dec. 1, 2003. Published December 2003. Originally
approved in 1995. Last previous edition approved in 2002 as D4716–02.
specimen.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.1.9.1 Discussion—“transmissivity” is technically appli-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
cable only to saturated, laminar hydraulic flow conditions (see
Standards volume information, refer to the standard’s Document Summary page on
Appendix X1). (D 4439)
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4716–03
3.1.10 in-plane flow, n—fluid flow confined to a direction temperature, etc., then conduct comparative tests to determine
parallel to the plane of a geosynthetic. (D 4439) if there is a statistical bias between their laboratories. Compe-
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