1、Designation: D 6461 99Standard Specification forSilt Fence Materials1This standard is issued under the fixed designation D 6461; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses ind
2、icates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers requirements and test methodsfor geotextile fabrics and associated components used intemporary silt fence applications. This is a mat
3、erial purchasingspecification based on AASHTO M288.1.2 This specification is applicable to the use of a geotextileas a vertical permeable interceptor designed to remove sus-pended soil from overland, nonconcentrated water flow. Thefunction of a temporary silt fence is to trap and allowsettlement of
4、soil particles from sediment laden water. Thepurpose is to greatly limit the transport of eroded soil from thea construction site by water runoff.1.3 The tests used to characterize the silt fence are intendedto ensure good workmanship and quality and are not necessar-ily adequate for design purposes
5、 in view of the wide variety ofpossible sediments and performance objectives.1.4 The values stated in SI units are to be regarded as thestandard. The values in inch-pound units are provided forinformation only.2. Referenced Documents2.1 ASTM Standards:D 123 Terminology Relating to Textiles2D 276 Tes
6、t Method for Identification of Fibers in Textiles2D 4354 Practice for Sampling of Geosynthetics for Testing3D 4355 Test Method for Deterioration of Geotextiles fromExposure to Ultraviolet Light and Water (Xenon-Arc TypeApparatus)3D 4439 Terminology for Geosynthetics3D 4491 Test Methods for Water Per
7、meability of Geotextilesby Permittivity3D 4632 Test Method for Grab Breaking Load and Elonga-tion of Geotextiles3D 4751 Test Method for Determining Apparent OpeningSize of a Geotextile3D 4759 Practice for Determining the Specification Con-formance of Geosynthetics3D 4873 Guide for Identification, St
8、orage and Handling ofGeotextiles3D 5141 Test Method to Determine Filtering Efficiency andFlow Rate for Silt Fence Applications Using Site SpecificSoils32.2 AASHTO Standard:M288-96 Standard Specification for Geotextile Specifica-tion for Highway Applications43. Materials and Manufacture3.1 Fibers use
9、d in the manufacture of geotextiles for siltfence, and the threads used in joining geotextiles by sewing,shall consist of long-chain synthetic polymers composed of atleast 95 % by weight of polyolefins or polyester. They shall beformed into a stable network such that the filaments or yarnsretain the
10、ir dimensional stability relative to each other, includ-ing selvages.3.2 Geotextiles and related materials used for temporary siltfence shall conform with the physical requirements of Sections7 and 8.3.3 All property values, with the exception of apparentopening size (AOS), in this specification rep
11、resent minimumaverage roll values (MARV) in the weakest principle direction(that is, average test results of any roll in a lot sampled forconformance or quality assurance testing shall meet or exceedthe minimum value provided herein). Values for AOS representmaximum average roll values.4. Sampling,
12、Testing, and Acceptance4.1 Silt fence shall be subject to sampling and testing toverify conformance with this specification. Sampling for test-ing shall be in accordance with Practice D 4354. Acceptanceshall be based on testing of either conformance samplesobtained using Procedure A of Practice D 43
13、54, or based onmanufacturers certifications and testing of quality assurancesamples obtained using Procedure B of Practice D 4354. A lotsize for conformance or quality assurance sampling shall beconsidered to be the shipment quantity of the given product ora truckload of the given product, whichever
14、 is smaller.4.2 Testing shall be performed in accordance with the testmethods referenced in this specification for the indicatedapplication. The number of specimens to test per sample isspecified by each test method. Geotextile product acceptanceshall be based on Practice D 4759. Product acceptance
15、is1This specification is under the jurisdiction of ASTM Committee D-18 on Soiland Rock and is the direct responsibility of Subcommittee D18.25 on Erosion andSediment Control Technology.Current edition approved Oct, 10, 1999. Published January 2000.2Annual Book of ASTM Standards, Vol 07.01.3Annual Bo
16、ok of ASTM Standards, Vol 04.09.4Available from American Association of State Highway and Transportation(AASHTO), 440 N. Capital Street NW, Washington, DC 2001.1Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.determined by comparing the average test results of
17、allspecimens within a given sample to the specification MARV.Refer to Practice D 4759 for more details regarding geotextileacceptance procedures.5. Certification5.1 The contractor shall provide to the Engineer a certificatestating the name of the manufacturer, product name, stylenumber, chemical com
18、position of the filaments or yarns andother pertinent information related to posts, post spacing,support mesh, and other components to fully describe the siltfence system.5.2 The manufacturer is responsible for establishing andmaintaining a quality control program to assure compliancewith the requir
19、ements of the controlling material specification.Documentation describing the quality control program shall bemade available upon request.5.3 The manufacturers certificate shall state that the fur-nished silt fence materials meet the requirements of thecontrolling specification as evaluated under th
20、e manufacturersquality control program. The certificate shall be attested to bya person having legal authority to bind the manufacturer.5.4 Either mislabeling or misrepresentation of materialsshall be reason to reject those silt fence materials.6. Shipment and Storage6.1 Silt fence labeling, shipmen
21、t and storage shall followGuide D 4873. Product labels shall clearly show the manufac-turer or supplier name, style name, and roll number. Eachshipping document shall include a notation certifying that thematerial is in accordance with the manufacturers certificate.6.2 Each silt fence roll shall be
22、wrapped with a material thatwill protect the geotextile from damage due to shipment, water,sunlight, and contaminants. The protective wrapping shall bemaintained during periods of shipment and storage.6.3 During storage, silt fence rolls shall be elevated off theground and adequately covered to prot
23、ect them from thefollowingsite construction damage, precipitation, extendedultraviolet radiation including sunlight, chemicals that arestrong acids or strong bases, flames including welding sparks,temperatures in excess of 71C (160F), and any other envi-ronmental condition that may damage the physic
24、al propertyvalues of the geotextile.7. Temporary Silt Fence Material Requirements7.1 The geotextile used for temporary silt fence may or maynot be supported between posts with wire or polymeric mesh.The temporary silt fence geotextile shall meet the requirementsof Table 1. Grab strength and permitti
25、vity values in Table 1represent minimum average roll values (MARV). Values forAOS represent maximum average roll values (MaxARV).Ultraviolet stability values are typical values.7.2 The minimum height above ground for all silt fenceshall be 750 mm (2.5 ft). Minimum embedment depth shall be150 mm (0.5
26、 ft). Thus, the minimum silt fence width shall be900 mm (3 ft).7.3 Maximum post spacing shall be based on the fabricsupport or, if unsupported, on elongation as measured inaccordance with Test Method D 4632. Supported silt fenceshall have a maximum post spacing of 1.2 m (4 ft). Unsup-ported silt fen
27、ce with elongation $ 50 % shall also have amaximum post spacing of 1.2 m (4 ft). Unsupported silt fencewith elongation 50 % shall have a maximum post spacing of2 m (6.5 ft).8. Related Material Requirements8.1 Wood, steel, or synthetic support posts having a mini-mum length of 1 m (3.3 ft) plus the b
28、urial depth may be used.They shall be of sufficient strength to resist damage duringinstallation and to the support applied loads due to materialbuild up behind the silt fence.NOTE 1It has been found that hardwood posts having dimensions ofat least 30 by 30 mm (1.2 by 1.2 in), No. 2 Southern Pine at
29、 least 65 by65 mm (2.5 by 2.5 in) or steel posts of UTL or C shape, weighing 600 gper 300 mm (1.3 lb/ft) have performed satisfactorily.8.2 Wire or polymer support fence shall be at least 750 mm(2.5 ft) high and strong enough to support applied loads.Polymer support fences shall meet the same ultravi
30、olet degra-dation requirements as the geotextile.NOTE 2Wire support fence having at least 6 horizontal wires, andbeing at least 14 gage wire have performed satisfactorily. Vertical wiresshould be a maximum of 150 mm (0.5 ft) apart.TABLE 1 Temporary Silt Fence Material Property RequirementsTest Metho
31、ds UnitsSupportedASilt FenceUnsupportedASilt Fence Type of ValueGrab Strength ASTM D 4632 N (lbs)Machine Direction 400 550 MARV(90) (90)X-Machine Direction 400 450 MARV(90) (90)PermittivityBASTM D 4491 sec-1 0.05 0.05 MARVApparent Opening SizeBASTM D 4751 mm 0.60 0.60 Max. ARVC(US Sieve #) (30) (30)
32、Ultraviolet Stability ASTM D 4355 %RetainedStrength70 % after500hofexposure70 % after500hofexposureTypicalASilt fence support shall consist of 14 gage steel wire with a mesh spacing of 150 mm (6 in.) or prefabricated polymer mesh of equivalent strength.BThese default values are based on empirical ev
33、idence with a variety of sediments. For environmentally sensitive areas, a review of previous experience and/or site orregionally specific geotextile tests in accordance with Test Method D 5141 should be performed by the agency to confirm suitability of these requirements.CAs measured in accordance
34、with Test Method D 4632.D 64612The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any suchpate
35、nt rights, and the risk of infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited eit
36、her for revision of this standard or for additional standardsand should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsibletechnical committee, which you may attend. If you feel that your comments have not received a fair hearing you sh
37、ould make yourviews known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website (www.astm.org).D 64613
