1、Designation: D7560 16Standard Test Method forDetermination of Fiber Length Percentages in HydraulicErosion Control Products (HECPs)1This standard is issued under the fixed designation D7560; the number immediately following the designation indicates the year oforiginal adoption or, in the case of re
2、vision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method provides the requirements and proce-dures needed to determine quantitatively the
3、fiber lengthpercentages of hydraulic erosion control products (HECPs).1.2 This test method allows for comparative evaluation ofin-process HECPs to a manufactured product specification.1.3 UnitsThe values stated in SI units are to be regardedas the standard. US standard units are provided in parenthe
4、ses.1.4 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to
5、 establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil, Rock, and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing an
6、d/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4753 Guide for Evaluating, Selecting, and Specifying Bal-ances and Standard Masses for Use in Soil, Rock, andConstruction Materials TestingD6026 Practice for Using Significant Digits in GeotechnicalDataE11 Specification f
7、or Woven Wire Test Sieve Cloth and TestSieves3. Terminology3.1 DefinitionsFor common definitions of technical termsused in this standard, refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 hydraulic erosion control product, HECP, namanufactured, temporary, degradable,
8、 pre-packaged fibrousmaterial that is mixed with water and hydraulically applied asa slurry designed to reduce soil erosion and assist in theestablishment and growth of vegetation.3.2.2 hydraulically applied, adjin erosion control, appliedwithin a water slurry, solution, or emulsion to the soil surf
9、aceas a spray-on or dropped-on application through variousmeans, such as nozzle, tower, and aerially.4. Summary of Test Method4.1 A sample of HECP is placed in a sieve shaker machineand after five minutes, the various screens are emptied and thecumulative fiber retained on each sieve is weighed and
10、thepercent retained for each sieve is recorded on the data sheet.5. Significance and Use5.1 This test method determines the various fiber lengthsthat make up an HECP fiber mulch material. HECP fibers areengineered and processed to specific length and width dimen-sions that facilitate the hydraulic a
11、pplication and preventclogging of the pump, recirculation pipes, nozzles, and tips.5.2 This test method is used by manufacturers of HECPproducts for quality assurance testing.6. Apparatus6.1 A balance or scale conforming to the requirements ofGuide D4753 readable to 0.1% of the total test mass, or b
12、etter.See Annex A1 for examples.6.2 Sieve shaker machine capable of a minimum of 270oscillations in a circular motion and a minimum of 150 verticaltaps per minute. The sieve shaker must be able to hold six fullheight 50 mm (2 in.) sieves with a diameter of 200 mm (8 in.).6.3 Test sieves compliant wi
13、th E11 - 13, Requirements. Thespecified sieve frame are 203 mm (8 in.) in diameter and 50.8mm (2 in.) in height.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.25.01 on Mulches.Current edition approved July 1, 2016
14、. Published July 2016. DOI: 10.1520/D7560-16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM I
15、nternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16.4 Standard sieve set consisting of 2.36 mm No. 8 (.0937in.), 1.18 mm No. 16 (0.0469 in.), 0.71 mm No. 25 (0.0278 in.),0.3 mm No. 50 (0.0117 in.), 0.150 mm No. 100 (0.0059 in.),and sieve pan.7. Hazards
16、7.1 7.1 HECPs may be dusty and a dust mask is recom-mended when working with these products.8. Sampling, Test Specimens, and Test Units8.1 When testing during the manufacturing process, obtain asample of at least 90 g (3.17 oz) with a moisture content of 106 5 % before the bagging procedure.8.1.1 Pl
17、ace the fiber in a large mixing bowl and break thecompressed fibers apart with your thumb and fingers.8.2 When testing from a full, sealed bag, prepare thespecimen by separating 90 g (3.17 oz) of fiber from anundamaged bag or bale taking one third from the top, one thirdfrom the middle, and one thir
18、d from the bottom of the bag.8.2.1 Place the fibers in a large mixing bowl and gentlybreak the compressed fibers apart with your thumb and fingers.9. Procedure9.1 Assemble the sieve set as described in 6.4 from largestdiameter openings to the smallest and sieve pan.9.2 Measure out 10 g (0.35 oz) of
19、fiber, place it on the topscreen of the sieve stack, and place the sieve stack in the sieveshaker machine.9.2.1 Set the timer for five minutes and allow the sieve pansto shake.9.2.2 After five minutes, remove the fiber from each sieveand the bottom sieve pan; determine and record the mass to 0.1g (0
20、.0035 oz).NOTE 1The quality of the result produced by these test methods isdependent on the competence of the personnel performing it, and thesuitability of the equipment and facilities used. Agencies that meet thecriteria of Practice D3740 are generally considered capable of competentand objective
21、testing/sampling/inspection/etc. Users of these test methodsare cautioned that compliance with Practice D3740 does not in itselfassure reliable results. Reliable results depend on many factors; PracticeD3740 provides a means of evaluating some of those factors.10. Calculation or Interpretation of Re
22、sults10.1 Total the volume of fiber retained on each sieveincluding the sieve pan, divide the mass of a single sieve orsieve pan by the total to determine percent collected, and reportthe percent cumulative retained for each sieve and sieve pan.11. Report: Test Data Sheet(s)/Form(s)11.1 Record as a
23、minimum the following test specimen data.11.1.1 Date the test was performed, technician performingthe test and the material that was tested and the manufacturerof the HECP product.11.1.2 The percentage of cumulative retained fiber on eachsieve and the pan.11.2 Fig. X1.1 shows an example data recordi
24、ng sheet forHECP sieve analysis.11.3 Reporting of Significant Digits:11.3.1 All measured and calculated values shall conform tothe guidelines for significant digits and rounding established inPractice D6026.11.3.2 The procedures used to specify how data arecollected/recorded or calculated, in this s
25、tandard are regardedas the industry standard. In addition, they are representative ofthe significant digits that generally should be retained. Theprocedures used do not consider material variation, purpose forobtaining the data, special purpose studies, or any consider-ations for the users objective
26、s; and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations. It is beyond the scopeof this standard to consider significant digits used in analysismethods for engineering design.12. Precision and Bias12.1 PrecisionTest data on pre
27、cision is not presented dueto the nature of the HECP materials tested by this test method.It is either not feasible or too costly at this time to have ten ormore laboratories participate in a round-robin testing programwith varying brands of sieve shakers capable of meeting therequirements stated in
28、 6.2.12.2 The Subcommittee D18.25 is seeking any data fromthe users of this test method that might be used to make alimited statement on precision.12.3 BiasThere is no accepted reference value for this testmethod, therefore, bias cannot be determined.13. Keywords13.1 fiber mulch; HECP; hydraulic ero
29、sion control productsD7560 162APPENDIX(Nonmandatory Information)X1. EXAMPLE DATA SHEETX1.1 See Fig. X1.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that
30、 determination of the validity of any such patent rights, and the riskof 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 reapprov
31、ed or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you fee
32、l that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual repr
33、ints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ X1.1 Example Data SheetD7560 163
