1、Designation: D 7367 07Standard Test Method forDetermining Water Holding Capacity of Fiber Mulches forHydraulic Planting1This standard is issued under the fixed designation D 7367; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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
3、agricul-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 w
4、aterholding 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 The values stated in SI units are to be regarde
5、d as thestandard. The values given in parentheses are for informationonly.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 determine
6、 the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 653 Terminology Relating to Soil, Rock, and ContainedFluidsE 11 Specification for Wire Cloth and Sieves for TestingPurposes3. Terminology3.1 For common definitions of terms in this standard refer
7、toTerminology D 653.4. 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 the test is
8、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 and rate of
9、seed germination.6. Apparatus6.1 203.2 mm (8 in.) diameter #8 sieve.6.2 203.2 mm (8 in.) 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 3 279 mm (18 in. 3 11 in.) baking pan or trayfor draini
10、ng.6.6 KitchenAid mixer3with dough kneader attachmentcapable of 60 to 90 rpm on low setting (low rpms minimizedamage to fibers).7. Sampling and Testing Specimens7.1 Prepare specimen by separating 90 g of fiber from anundamaged bag or bale taking 1/3 from the top of the bag, 1/3from the middle of the
11、 bag and 1/3 from the bottom of the 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 (73F 6 4F) and at ahumidity level of 50 % RH 610 % for 24 h.
12、1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.25 on Erosion andSediment Control Technology.Current edition approved July 1, 2007. Published July 2007.2For referenced ASTM standards, visit the ASTM website, www.as
13、tm.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.3The sole source of supply of the apparatus known to the committee at this timeis KitchenAid, P.O. Box 218, St. Joseph, MI,
14、 49085, . If youare aware of alternative suppliers, please provide this information to ASTMInternational Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.1Copyright ASTM International, 100 Barr Harbor Drive, PO Bo
15、x C700, West Conshohocken, PA 19428-2959, United States.8. Procedure8.1 Weigh mixing bowl and place 15 g of conditioned fiberin mixing bowl. Add 300 mL of distilled water at roomtemperature (23C 6 2C (73F 6 4F) to the bowl. Blend for5 min with kitchen mixer at low setting.8.2 Weigh sieve and sieve p
16、an.8.3 Place mixed 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 con
17、tents in sieve pan.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 spe
18、cimen in sieve and 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 wat
19、er to escape into the 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 wat
20、er holding capacity as follows:Water Holding Capacity % 5 KX!/XY! 3 100where:K = weight of 203.2 mm (8 in.) sieve and pan and saturatedmulch,X = weight of 203.2 mm (8 in.) sieve and pan and 15 g ofdry mulch,Y = weight of 203.2 mm (8 in.) sieve and pan.8.15 Perform three replications for each mulch t
21、ype tested.9. Report9.1 Report the water 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 performanceof hydraulically applie
22、d fibers mulches can be defined only interms 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
23、 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 determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own resp
24、onsibility.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 either for revision of this standard or for additional standardsand should be addresse
25、d to ASTM International Headquarters. 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
26、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 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).D7367072
