ASTM D4884-09

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4884–09
Standard Test Method for
Strength of Sewn or Thermally Bonded Seams of
1
Geotextiles
This standard is issued under the fixed designation D4884; 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.
3
1. Scope Fed. Std. No. 751a Stitches, Seams, and Stitchings
1.1 Thistestmethodcoverstheseamstrengthofgeotextiles.
3. Terminology
The primary distinction of this test method for evaluating seam
3.1 Definitions:
strength is the width of the specimen. This is in contrast to the
3.1.1 cross-machine direction—the direction in the plane of
more narrow specimen width used in the tensile grab strength
the geotextile perpendicular to the direction of manufacture.
test discussed in Test Method D1683.
3.1.2 geotextile, n—a permeable geosynthetic comprised
1.2 This test method will provide data to indicate the seam
solely of textiles.
strength that can be achieved for each particular geotextile and
3.1.3 linear density, n—mass per unit length; the quotient
seam assembly construction.
obtained by dividing the mass of a fiber or yarn by its length.
1.3 The values stated in SI units are to be regarded as
3.1.4 machine direction—the direction in the plane of the
standard. The inch-pound units given in parentheses are
geotextile parallel to the direction of manufacture.
provided for information only.
3.1.5 seam allowance, n—the width of geotextile used in
1.4 This standard does not purport to address all of the
making a seam assembly, for sewn seams bounded by the edge
safety concerns, if any, associated with its use. It is the
of the geotextile and the furthest stitch line, and for thermally
responsibility of the user of this standard to establish appro-
bonded seams bounded by the edge of the geotextile and the
priate safety and health practices and determine the applica-
furthest seam edge.
bility of regulatory limitations prior to use.
3.1.5.1 Discussion—In geotextiles, the distance from the
2. Referenced Documents selvageorturnededgeofthegeotextiletotheedgeoftheseam.
2
3.1.6 seam assembly, n—the unit obtained by joining geo-
2.1 ASTM Standards:
textile with a seam, including details such as geotextile
D76 Specification for Tensile Testing Machines for Textiles
direction(s), seam allowance, seam width, seam type, speed,
D123 Terminology Relating to Textiles
and if sewn—sewing threads used and number of stitches per
D1683 Test Method for Failure in Sewn Seams of Woven
unit length, needle type and size, and so forth.
Apparel Fabrics
3.1.7 seam effıciency, n—theratioexpressedasapercentage
D1776 Practice for Conditioning and Testing Textiles
of seam strength to geotextile strength.
D1777 Test Method for Thickness of Textile Materials
3.1.8 seam design engineering, n—the procedures used to
D4439 Terminology for Geosynthetics
select a specific thread, a specific stitch type, and a specific
D4595 Test Method forTensile Properties of Geotextiles by
seam type to achieve the required seam strength of a sewn
the Wide-Width Strip Method
seam and the procedures used to select a specific seam width,
E178 Practice for Dealing With Outlying Observations
specific seam bonding temperature, and a specific seam speed
E691 Practice for Conducting an Interlaboratory Study to
and pressure to achieve the required seam strength of a
Determine the Precision of a Test Method
thermally bonded seam.
2.2 Federal Standard:
3.1.9 seam interaction, n—the result of combining specific
textile, a specific stitch type, and a specific seam type for a
sewn seam and the result of combining specific textile, a
1
This test method is under the jurisdiction of ASTM Committee D35 on
specific seam width, a specific seam speed, and applied
Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechani-
pressure for a thermally bonded seam.
cal Properties.
Current edition approved June 1, 2009. Published July 2009. Originallyapproved
3.1.10 seam type, n—in sewn geotextiles, an alphanumeric
in 1989. Last previous edition approved in 2003 as D4884 – 96(2003). DOI:
designationrelatingtotheessentialcharacteristicsofgeotextile
10.1520/D4884-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
the ASTM website. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

----------------------
...