1、Designation:D646012Standard Test Method forDetermination of Rolled Erosion Control Product(RECP)Performance in Protecting Earthen Channels fromStormwater-Induced Erosion1This standard is issued under the fixed designation D6460;the number immediately following the designation indicates the year ofor
2、iginal adoption or,in the case of revision,the 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.Scope*1.1 This test method covers the guidelines,requirementsand procedures f
3、or evaluating the ability of Rolled ErosionControl Products(RECPs)to protect earthen channels fromstormwater-induced erosion.Critical elements of this protec-tion are the ability of the RECP to:1.1.1 Neutralize and absorb the hydraulic force ofstormwater,thereby reducing soil particle loosening thro
4、ugh“scour”mechanisms;1.1.2 Slow runoff and encourage sedimentation,therebyreducing soil particle transport downstream;1.1.3 Absorb shear forces of overland flow;1.1.4 Trap soil particles beneath;and1.1.5 Promote the establishment of vegetation.1.2 This test method utilizes full-scale testing procedu
5、res,rather than reduced-scale(bench-scale)simulation,and ispatterned after conditions typically found on construction sitesprior to and after revegetation work.Further,procedures forevaluation of baseline conditions are provided.Thus,testpreparation,test execution,data collection,data analysis andre
6、porting procedures herein are intended to be suitable fortesting of bare soil,unvegetated RECP,vegetated soil andvegetated RECP conditions.1.3 This test method provides a comparative evaluation ofan unvegetated RECP to baseline bare soil conditions and avegetated RECP to a baseline,vegetated conditi
7、on undercontrolled and documented conditions.1.4 The values stated in SI units are to be regarded asstandard.The inch-pound units given in parentheses areprovided for information purposes only.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It i
8、s 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.Also,the user mustcomply with prevalent regulatory codes,such as OSHA(Oc-cupational Health and Safety Administration)guidelin
9、es,whileusing the test method.2.Referenced Documents2.1 ASTM Standards:2C136 Test Method for Sieve Analysis of Fine and CoarseAggregatesD422 Test Method for Particle-Size Analysis of SoilsD698 Test Methods for Laboratory Compaction Character-istics of Soil Using Standard Effort(12 400 ft-lbf/ft3(600
10、kN-m/m3)D1556 Test Method for Density and Unit Weight of Soil inPlace by Sand-Cone MethodD2922 Test Methods for Density of Soil and Soil-Aggregatein Place by Nuclear Methods(Shallow Depth)(With-drawn 2007)3D4318 Test Methods for Liquid Limit,Plastic Limit,andPlasticity Index of SoilsD4595 Test Metho
11、d for Tensile Properties of Geotextiles bythe Wide-Width Strip MethodD6475 Test Method for Measuring Mass Per Unit Area ofErosion Control Blankets(Withdrawn 2015)3D6525 Test Method for Measuring Nominal Thickness ofRolled Erosion Control ProductsD6526 Test Method for Analysis of Toluene by Capillary
12、Column Gas ChromatographyD6566 Test Method for Measuring Mass per Unit Area ofTurf Reinforcement MatsD6567 Test Method for Measuring the Light Penetration ofa Turf Reinforcement Mat(TRM)D6818 Test Method for Ultimate Tensile Properties ofRolled Erosion Control Products1This test method is under the
13、jurisdiction ofASTM Committee D18 on Soil andRock;Subcommittee D18.25 on Erosion and Sediment Control Technology;and isthe direct responsibility of Section.02 on Erosion Control Blankets(ECBs).Current edition approved March 1,2012.Published April 2012.Originallyapproved in 1999.Last previous edition
14、 approved in 2007 as D646007.DOI:10.1520/D6460-12.2For referenced ASTM standards,visit the ASTM website,www.astm.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 last approv
15、ed version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.Terminology3.1 Definitions of Terms Specific to This St
16、andard:3.1.1 erosion control blanket(ECB),na degradablematerial,composed primarily of processed natural organicmaterials,manufactured or fabricated into rolls designed toreduce soil erosion and assist in the growth,establishment andprotection of vegetation.3.1.2 erosion control net(ECN),na planar woven naturalfiber or extruded synthetic mesh used as a component in themanufacture of ECBs.3.1.3 index test,na test procedure which may contain aknown bias,but which may be used to establish an order f
