ASTM_D_6475_-_00.pdf

Designation:D 6475 00Standard Test Method forMeasuring Mass Per Unit Area of Erosion Control Blankets1This standard is issued under the fixed designation D 6475;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the 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 test method can be used as an index test todetermine the mass per unit area of all erosion control blankets(ECBs).1.2 This test method requires several hours for properdrying of the specimen in an oven at high temperature.1.3 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D 6026.1.3.1 The method used to specify collection,calculation,orrecording of data in this standard is not directly related to theaccuracy to which the data can be applied in design or in otheruses,or both.Application of the results obtained using thisstandard is beyond its scope.1.4 The values stated in SI units shall be regarded asstandard.The values stated in parentheses are provided forinformation only.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 establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D 123 Terminology Relating to Geotextiles2D 653 Terminology Relating to Soil,Rock,and ContainedFluids3D 1776 Practice for Conditioning Textiles for Testing2D 3740 Practice for Minumum Requirements for AgenciesEngaged in the Testing and/or Inspection of Soil and Rockas Used in Engineering Design and Construction3D 4354 Practice for Sampling Geosynthetics for Testing4D 4439 Terminology for Geosynthetics4D 5261 Test Method for Measuring Mass per Unit Area ofGeotextiles4D 6026 Practice for Using Significant Digits in Calculatingand Reporting Geotechnical Test Data5E 145 Specification for Gravity-Convection and Forced-Ventilation Ovens62.2Erosion Control Technology Council Standard:7Technical Guidance Manual,Terminology and Index Test-ing Procedures for Rolled Erosion Control Products3.Terminology3.1 Definitions:3.1.1 erosion control blanket,ECB,na degradable mate-rial,composed primarily of processed natural organic materi-als,manufactured or fabricated into rolls designed to reducesoil erosion and assist in the growth,establishment,andprotection of vegetation.3.1.2 erosion control net,ECN,na planar woven naturalfiber or extruded geosynthetic mesh used as a component in themanufacture of ECBs.3.1.3 index test,na test procedure that may be used toestablish an order for a set of specimens with respect to theproperty of interest.3.1.4 lot,na unit of production,or a group of other unitsor packages,taken for sampling or statistical examination,having one or more common properties and being readilyseparable from other similar units.3.1.5 natural,adjdescribes a class of various genera offibers,of animal or vegetable origin.3.1.6 polymer,na chemical compound or mixture ofcompounds formed by polymerization and consisting essen-tially of repeating structural units.3.1.7 sample,na portion of material that is taken fortesting or recording purposes and used in the laboratory as asource of individual specimens.3.1.8 temporary degradable,nan erosion control blanketcomposed of biologically,photochemically,or otherwise de-gradable materials that temporarily reduce soil erosion andenhances the establishment of vegetation.4.Summary of Test Method4.1 The mass per unit area of an ECB is determined byweighing test specimens of known dimensions cut fromvarious locations over the full width of the laboratory sample.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.Current edition approved Jan.10,2000.Published March 2000.Originallypublished as D 647599.Last previous edition D 647599.2Annual Book of ASTM Standards,Vol 07.01.3Annual Book of ASTM Standards,Vol 04.08.4Annual Book of ASTM Standards,Vol 04.13.5Annual Book of ASTM Standards,Vol 04.09.6Annual Book of ASTM Standards,Vol 14.02.7Available from ISO Case Postale 56,CH-1211,Geneva 20,Switzerland.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.The measured weight is then used to calculate the mass per unitarea of the specimen,and these values are averaged to obtainthe mean mass per unit area of the laboratory sample.5.Significance and Use5.1 This test method is used to determine if the ECB meetsspecifications for mass per unit area.This measurement allowsfor a simple control of the delivered material by a comparisonof the mass per unit area of the delivered material and thespecified