1、Designation:D820218Standard Specification forHydraulically Applied 100%Wheat Straw Fiber Mulches1This standard is issued under the fixed designation D8202;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu
2、mber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the composition,physicalrequirements,manufacturing methods of hydraulically appliedwheat straw fiber mulches for re
3、vegetation,sediment anderosion control.1.2 The purpose of this specification is to provide a refer-ence for describing and specifying wheat straw fiber mulchmaterials for hydraulic applications.1.3 UnitsThe values stated in inch-pound units are to beregarded as standard,except as noted below.The val
4、ues givenin parentheses are mathematical conversions to SI units,whichare provided for information only and are not consideredstandard.The sieve designations are identified using the“alternative”system in accordance with Practice E11,such as3-in.and No.200,instead of the“standard”of 75-mm and75-m,re
5、spectively.1.4 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this test method.1.4.1 The procedures used to specify how data are collected/recorded and calculated in the standard are regarded as
6、theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice
7、toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof these test methods to consider significant digits used inanalysis methods for engineering data.1.5 This standard does not purport to address all of thesafety concerns,if any,
8、associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally r
9、ecognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:D653 Terminology Relat
10、ing to Soil,Rock,and ContainedFluidsD2974 Test Methods for Moisture,Ash,and Organic Matterof Peat and Other Organic SoilsD2976 Test Method for pH of Peat MaterialsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design an
11、d ConstructionD6026 Practice for Using Significant Digits in GeotechnicalDataD7367 Test Method for Determining Water Holding Capac-ity of Fiber Mulches for Hydraulic PlantingD7560 Test Method for Determination of Fiber LengthPercentages in Hydraulic Erosion Control Products(HECPs)E11 Specification f
12、or Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 Definitions:3.1.1 For definitions of common technical terms used in thisstandard,refer to Terminology D653.3.1.2 hydraulic erosion control product,(HECP),namanufactured,temporary,degradable,prepackaged fibrous ma-terial that is mixed with
13、 water and hydraulically applied as aslurry designed to reduce soil erosion and assist in theestablishment and growth of vegetation.3.2 Definitions of Terms Specific to This Standard:3.2.1 fiber mulch,nthe mulching medium used eitheralone,or with additives,mixed with water in hydro-mulchingequipment
14、,wetting rapidly with uniform dispersal to create ahomogeneous slurry.3.2.2 hydraulically applied,adjin erosion control,refersto the application method of a material using a water slurry,solution,or emulsion to the soil surface through various means,such as nozzle application by hose,tower,and aeria
15、lly.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 1,2018.Published July 2018.DOI:10.1520/D820218Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West C
16、onshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.Materials and Manufacture4.1 The use of the listed test methods and parameters arerelated to the manufacturing and end use of the material,tode
