ASTM D7931-17

Standard Guide for Specifying Drainage Geocomposites

SIGNIFICANCE AND USE
4.1 This guide is intended to aid designers, purchasers, installers, contractors, owners, operators, and agencies in establishing the minimum criteria to specify drainage geocomposites. Specifically, this guide presents a methodology for determining the allowable flow rate of a candidate drainage geocomposite. The resulting value is then compared to a required (or design) flow rate for a product-specific and site-specific factor of safety.  
4.2 It is recognized that there are other products that may achieve the same performance requirements but are not listed in this document. Manufacturers of such products are invited to implement this standard guide with the appropriate information.  
4.3 It should be recognized that parties, organizations, or representatives may perform additional tests other than those required in this guide. In this case, the more stringent project-specific tests will then take precedence.  
4.4 By simulating site-specific conditions (inclusive of site-specific liquids and temperatures except for load duration beyond 100 h, chemical/biological clogging, and geotextile intrusion), additional reduction factors need not be explicitly accounted for in certain products.
SCOPE
1.1 This guide presents a guideline specifying a drainage geocomposite product; it specifically provides recommendations to determine the allowable flow rate of a candidate drainage geocomposite. The resulting value is then compared to a required (or design) flow rate for a product-specific and site-specific factor of safety.  
1.2 This guide is intended to aid designers, purchasers, installers, contractors, owners, operators, and agencies in establishing minimum guidelines for drainage geocomposite materials. This guide is not to be used for manufacturer’s quality control purposes, nor a construction quality assurance specification.  
1.3 This guide does not address the required (or design) flow rate value, nor the subsequent factor of safety values, which are typically design specific.  
1.4 The procedures recommended in this guide use ASTM test methods.  
1.5 This guide is applicable to all types of drainage geocomposites regardless of their core configuration or geotextile type. It can also be used to evaluate thick nonwoven geotextiles that provide drainage.  
1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
1.7 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This guide cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This guide is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this guide be applied without consideration of a project’s many unique aspects. The word ‘standard’ in the title of this guide means only that the guide has been approved through the ASTM International consensus process.  
1.8 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-Aug-2017
• ICS: 59.080.70 - Geotextiles
• Technical Committee: D35 - Geosynthetics
• Drafting Committee: D35.03 - Permeability and Filtration

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7931 − 17
Standard Guide for
1
Specifying Drainage Geocomposites
This standard is issued under the fixed designation D7931; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope without consideration of a project’s many unique aspects. The
word ‘standard’ in the title of this guide means only that the
1.1 This guide presents a guideline specifying a drainage
guide has been approved through the ASTM International
geocomposite product; it specifically provides recommenda-
consensus process.
tions to determine the allowable flow rate of a candidate
1.8 This standard does not purport to address all of the
drainage geocomposite. The resulting value is then compared
safety concerns, if any, associated with its use. It is the
to a required (or design) flow rate for a product-specific and
responsibility of the user of this standard to establish appro-
site-specific factor of safety.
priate safety, health, and environmental practices and deter-
1.2 This guide is intended to aid designers, purchasers,
mine the applicability of regulatory limitations prior to use.
installers, contractors, owners, operators, and agencies in
1.9 This international standard was developed in accor-
establishing minimum guidelines for drainage geocomposite
dance with internationally recognized principles on standard-
materials. This guide is not to be used for manufacturer’s
ization established in the Decision on Principles for the
quality control purposes, nor a construction quality assurance
Development of International Standards, Guides and Recom-
specification.
mendations issued by the World Trade Organization Technical
1.3 This guide does not address the required (or design)
Barriers to Trade (TBT) Committee.
flow rate value, nor the subsequent factor of safety values,
which are typically design specific. 2. Referenced Documents
2
1.4 The procedures recommended in this guide use ASTM 2.1 ASTM Standards:
test methods. D1987 TestMethodforBiologicalCloggingofGeotextileor
Soil/Geotextile Filters
1.5 This guide is applicable to all types of drainage geo-
D2990 Test Methods for Tensile, Compressive, and Flexural
composites regardless of their core configuration or geotextile
Creep and Creep-Rupture of Plastics
type.Itcanalsobeusedtoevaluatethicknonwovengeotextiles
D4354 Practice for Sampling of Geosynthetics and Rolled
that provide drainage.
Erosion Control Products (RECPs) for Testing
1.6 The values stated in either SI units or inch-pound units
D4439 Terminology for Geosynthetics
are to be regarded separately as standard. The values stated in
D4716/D4716M TestMethodforDeterminingthe(In-plane)
each system may not be exact equivalents; therefore, each
Flow Rate per Unit Width and Hydraulic Transmissivity
system shall be used independently of the other. Combining
of a Geosynthetic Using a Constant Head
values from the two systems may result in nonconformance
D4873/D4873M Guide for Identification, Storage, and Han-
with the standard.
dling of Geosynthetic Rolls and Samples
1.7 This guide offers an organized collection of information D5321/D5321M Test Method for Determining the Shear
Strength of Soil-Geosynthetic and Geosynthetic-
oraseriesofoptionsanddoesnotrecommendaspecificcourse
of action. This guide cannot replace education or experience Geosynthetic Interfaces by Direct Shear
D5322 Practice for Laboratory Immersion Procedures for
and should be used in conjunction with professional judgment.
Not all aspects of this guide may be applicable in all circum- Evaluating the Chemical Resistance of Geosynthetics to
Liquids
stances. This guide is not intended to represent or replace the
standard of care by which the adequacy of a given professional D6243/D6243M Test Method for Determining the Internal
and Interface Shear Strength of Geosynthetic Clay Liner
service must be judged, nor should this guide be applied
by the Direct Shear Method
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ThisguideisunderthejurisdictionofASTMCommitteeD35onGeosynthetics
2
and is the direct responsibility of Subcommittee D35.03 on Permeability and For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Filtration. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Current edition approved Sept. 1, 2017. Published September 2017. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 2017. DOI: 10.1520/D7931-17. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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