ASTM D7880/D7880M-13

Standard Test Method for Determining Flow Rate of Water and Suspended Solids Retention from a Closed Geosynthetic Bag (Withdrawn 2022)

SIGNIFICANCE AND USE
5.1 This test method may be used as an aid to design geotextile container systems that contain fine-grained, high water content slurries such as dredged materials to meet special environmental or operational requirements. This test is often used to demonstrate the efficacy of geotextile dewatering to regulatory agencies in determining the amount of dredged material sediment passing through a geotextile and the flow rate for specific high water content materials.  
5.2 The designer can use this test method to assess the quantity of fine-grained dredged material sediment that may pass through the geotextile container into the environment.  
5.3 This test method is intended for evaluation of a specific material, as the results will depend on the specific high water content slurry and geotextile evaluated and the location of the geotextile container below or above water. It is recommended that the user or a design representative perform the test because geotextile manufacturers are not typically equipped to handle or test fine-grained slurries.  
5.4 This test method provides a means of evaluating geotextile containers with different dredged materials or high water content materials under various conditions. The number of times this test is repeated depends on the users and the test conditions.  
5.5 This test method may not simulate site conditions and the user is cautioned to carefully evaluate how the results are applied.
SCOPE
1.1 This test method is used to determine the flow rate of water and suspended solids through a geosynthetic permeable closed bag used to contain high water content slurry such as dredged material.  
1.2 The results for the water and sediment that pass through the geotextile bag are shown as liters of water per time period, and the percent total suspended solids in milligrams per liter or parts per million.  
1.3 The flow rate is the average rate of passage of a quantity of solids and water through the bag over a specific time period.  
1.4 This test method requires several pieces of specified equipment such as an integrated water sampler, analytical balance, geotextile bag, stand clear PVC pipes, testing frame, and clean containers to collect the decant water and a representative sample of high water content material from the proposed dredge area or slurry source.  
1.5 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 non-conformance with the standard.  
1.6 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.

General Information

• Status: Historical
• Publication Date: 30-Jun-2013
• ICS: 55.080 - Sacks. Bags
• 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: D7880/D7880M − 13
Standard Test Method for
Determining Flow Rate of Water and Suspended Solids
1
Retention from a Closed Geosynthetic Bag
This standard is issued under the fixed designation ; the number immediately following the designation indicates the year of original
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D653Terminology Relating to Soil, Rock, and Contained
Fluids
1.1 This test method is used to determine the flow rate of
D4354Practice for Sampling of Geosynthetics and Rolled
water and suspended solids through a geosynthetic permeable
Erosion Control Products(RECPs) for Testing
closed bag used to contain high water content slurry such as
D4439Terminology for Geosynthetics
dredged material.
1.2 The results for the water and sediment that pass through
3. Terminology
the geotextile bag are shown as liters of water per time period,
3.1 Definitions:
andthepercenttotalsuspendedsolidsinmilligramsperliteror
3.1.1 For definitions of other terms relating to
parts per million.
geosynthetics, refer to Terminology D4439.
1.3 Theflowrateistheaveragerateofpassageofaquantity
3.1.2 For definitions of textile terms, refer to Terminology
ofsolidsandwaterthroughthebagoveraspecifictimeperiod.
D123.
3.1.3 For definitions of soil terms, refer to Terminology
1.4 This test method requires several pieces of specified
D653.
equipment such as an integrated water sampler, analytical
3.1.4 high water content material, n—a slurry of water and
balance, geotextile bag, stand clear PVC pipes, testing frame,
solids exhibiting the properties of a liquid, typically having a
and clean containers to collect the decant water and a repre-
percent solids by weight smaller than 50 % (water content
sentative sample of high water content material from the
greater than 100 %), and the size of the solid particles tend to
proposed dredge area or slurry source.
be very fine grained (<0.064 mm).
1.5 The values stated in either SI units or inch-pound units
3.2 Definitions of Terms Specific to This Standard:
are to be regarded separately as standard. The values stated in
3.2.1 flow rate, n—volume of fluid per unit time, expressed
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining as an average, that passes through a geotextile hanging bag.
values from the two systems may result in non-conformance
3.2.2 geotextile hanging bag, n—bag, tube, sock, or con-
with the standard.
tainer designed and fabricated from a single or a combination
of layers of permeable geosynthetic to retain finegrained
1.6 This standard does not purport to address all of the
particles such as found in dredged material, for subsequent
safety concerns, if any, associated with its use. It is the
dewatering of the contained semi fluid materials.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use.
4.1 A geotextile bag is constructed by sewing one or more
2. Referenced Documents
layersofgeotextilestogethertoformaclosedcontainerwithan
2
2.1 ASTM Standards:
entry clear PVC pipe providing entry to the bag. The bag will
D123Terminology Relating to Textiles
support and contain a measured amount of saturated dredged
material or other high water content material.
1
4.2 The amount of water and sediment that flows through
This test method is under the jurisdiction of ASTM Committee D35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.03 on Perme-
the geotextile container is collected at given time intervals and
ability and Filtration.
measured. The amount of sediment passing the geotextile
Current edition approved July 1, 2013. Published July 2013. DOI: 10.1520/
container is determined as the total suspended solids.
D7880_D7880M–13
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.3 Use material from the designated area to be dredged at
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
the estimated initial percent solids as the actual field
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. conditions, or the source of the high water content material.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7880/D7880M − 13
5. Significance and Use 5.5 This test method may not simulate site conditions and
the user is cautioned to carefully evaluate how the results are
5.1 This test method may be used as an aid to design
applied.
geotex
...