1、Designation: D7367 14Standard Test Method forDetermining Water Holding Capacity of Fiber Mulches forHydraulic Planting1This standard is issued under the fixed designation D7367; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y
2、ear 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 quantitative test method determines water holdingcapacity of fiber mulches, including wood, paper, and agr
3、icul-turally derived and blended fiber mulches used for hydraulicplanting.1.2 The purpose of this test method is to provide a means ofevaluating water holding capacity in fiber mulches. Productspecimen is conditioned and weighed, saturated and re-weighed to determine water holding capacity. The wate
4、rholding capacity is expressed as a percentage of increasedweight after saturation. There are no known limitations to thistest method. No range of concentrations/values have beendetermined. This test method is preferably performed in alaboratory.1.3 UnitsThe values stated in SI units are to be regar
5、dedas standard. No other units of measurement are included in thisstandard.1.4 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 establish appro-priate safety and health practices and determin
6、e the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil, Rock, and ContainedFluidsE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3. Terminology3.1 DefinitionsFor common definitions of terms in thisstand
7、ard refer to Terminology D653.4. Summary of Test Method4.1 Product specimen is conditioned and weighed, saturatedand re-weighed to determine water holding capacity. The waterholding capacity is expressed as a percentage of increasedweight after saturation.5. Significance and Use5.1 The meaning of th
8、e test is related to the manufacturingand end use of the material, to determine characteristics ofproducts. The water holding capacity of hydraulically appliedmulches for hydraulic planting correlates directly with en-hanced slurry and spray patterns by providing better soil/slurrybinding ability an
9、d rate of seed germination.6. Apparatus6.1 203.2 mm diameter 2.36 mm sieve.6.2 203.2 mm diameter sieve pan.6.3 Large mixing bowl 5.5 L 6 (10 Pt 6) capacity.6.4 Electronic gram scale or balance scale with a minimumof 0.1 g resolution.6.5 457 mm 279 mm baking pan or tray for draining.6.6 Mixer with do
10、ugh kneader attachment capable of 60 to90 rpm on low setting (low rpms minimize damage to fibers).7. Sampling and Testing Specimens7.1 Prepare specimen by separating 90 g of fiber from anundamaged bag or bale taking13 from the top of the bag,13from the middle of the bag and13 from the bottom of the
11、bag(heterogeneous blends should be mixed at the same ratio byweight, as manufacturers specifications to equal 30 g).7.2 Break the compressed fiber apart and allow to conditionat room temperature 23C 6 2C and at a humidity level of50 % RH 610 % for 24 h.8. Procedure8.1 Weigh mixing bowl and place 15
12、g of conditioned fiberin mixing bowl. Add 300 mL of distilled water at roomtemperature (23C 6 2C) to the bowl. Blend for 5 min withkitchen mixer at low setting.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.25 on
13、Erosion andSediment Control Technology.Current edition approved April 15, 2014. Published June 2014. Originallyapproved in 2007. Last previous edition approved in 2007 as D7367 07.DOI:10.1520/D7367-07.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Servi
14、ce at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States18.2 Weigh sieve and sieve pan.8.3 Place mixed
15、fiber in sieve with pan underneath.8.4 Detach dough kneader attachment and rinse over mixingbowl using 100 mL of distilled water.8.5 Empty mixing bowl contents in sieve pan.8.6 Rinse mixing bowl with 300 mL of distilled water toremove any remaining fibers.8.7 Empty mixing bowl contents in sieve pan.
16、8.8 Using a spoon, distribute fibers evenly across the sievescreen surface.8.9 Place sieve in the large bowl containing enough distilledwater to saturate specimen without overflowing the sieve. Pourthe fiber and water mixture that collected in the pan into thesieve.8.9.1 Leave specimen in sieve and
17、sieve pan to remainsaturated for 30 min.8.10 Slowly remove sieve of saturated fiber and transfer it tothe large tray making sure pan remains parallel so the surfacetension is not broken.8.11 Place the edge of the sieve on the top of the sieve panat an angle that does not allow water to escape into t
18、he pan(creating enough of an angle to break the surface tension of thewater).8.11.1 Allow the sample to drain for 3 min.8.12 Dry the sieve pan with a paper towel.8.13 Record to the nearest 0.01 g the total weight of thesieve and sieve pan and saturated mulch.8.14 Calculate the water holding capacity
19、 as follows:Water Holding Capacity% 5 K 2 X!/X 2 Y! 3100where:K = weight of 203.2 mm sieve and pan and saturated mulch,X = weight of 203.2 mm sieve and pan and 15 g of drymulch,Y = weight of 203.2 mm sieve and pan.8.15 Perform three replications for each mulch type tested.9. Report9.1 Report the wat
20、er holding capacity as a percentage.9.1.1 Report average and standard deviation.10. Precision and Bias10.1 PrecisionThe precision of the procedure of this testmethod is being evaluated.10.2 BiasThe true value of erosion control performance ofhydraulically applied fibers mulches can be defined only i
21、nterms of a test method. Within this limitation, the proceduredescribed herein has no known bias and, since there is not anaccepted referee test method, the procedures of this test methodhave not inherent bias.11. Keywords11.1 fiber mulchASTM International takes no position respecting the validity o
22、f any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that 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
23、 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 either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.
24、Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel 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 c
25、opyrighted by ASTM International, 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 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 ASTM website (www.astm.org/COPYRIGHT/).D7367 142
