1、Designation:D798615Standard Practice forPreparing Specimens of Hydraulic Erosion Control Productsfor Index Property Testing1This standard is issued under the fixed designation D7986;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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice specifies a set of instructions for preparingsamples of hydraulic erosion control products(HECPs)for
3、index property testing.1.2 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.2.1 For purposes of comparing measured or calculatedvalue(s)with specified limits,the measured or calculatedvalue(s)shall be rounded to the
4、nearest decimal or significantdigits in the specified limits.1.2.2 The procedures used to specify how data are collected/recorded or calculated,in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be measured.Theproc
5、edures 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 toincrease or reduce the significant digits of reported data to becommensurate with these considerations.It is beyond the sco
6、peof this standard to consider significant digits used in theanalytical methods for engineering design.1.3 UnitsThe values stated in SI units are being regardedas standard.No other units of measurement are included in thepractice.1.4 This standard does not purport to address all of thesafety concern
7、s,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 the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and Con
8、tainedFluidsD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4753 Guide for Evaluating,Selecting,an
9、d Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD6026 Practice for Using Significant Digits in GeotechnicalDataE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Terminology3.1 Definitions:3.1.1 For definitions of common technical
10、 terms used in thisstandard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 Hydraulic Erosion Control Product(HECP),ninerosion control,a manufactured,temporary,degradable,pre-packaged fibrous material that is mixed with water andhydraulicallyapplied as a slurry to
11、reduce soil erosion andassist in the establishment and growth of vegetation.3.2.2 index property test,nin erosion control,a standardtest that may be used to compare the relative material proper-ties of erosion control products.4.Summary of Practice4.1 Asample of dry HECPproduct fiber is mixed with w
12、aterin an amount corresponding to a field application rate.Theresulting slurry is spread evenly on a metal sheet pan.Thematerial is dried and the resulting sample is removed and cut tosizes appropriate for index property tests.1This test method is under the jurisdiction ofASTM Committee D18 on Soil
13、andRock and is the direct responsibility of Subcommittee D18.25.01 on Mulches andTackifiers.Current edition approved Nov.1,2015.Published November 2015.DOI:10.1520/D7986-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annua
14、l 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 States1 5.Significance and Use5.1 This practice is intended to simulate mixing of HECPprodu
15、cts as would be mixed on a job or project site but in alaboratory environment on a smaller scale.Dried samples arenot necessarily intended to represent a field application ofHECP products but would be representative of the correctamount of material applied to a known area and provide a basisfor cons
16、istent and repeatable index property testing.NOTE1The quality of the result produced by this standard 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 testing/sampling/inspection/etc.Users of this standard arecautioned that compliance with Practice D3740 does not in itself assurereliable results.Reliable results depend on
