1、Designation:D682521Standard Guide forPlacement of Riprap Revetments1This standard is issued under the fixed designation D6825;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
2、 the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This guide covers methods to place riprap with associ-ated filters for erosion control purposes.This guide does notrecommend a specific course of action because of the d
3、iversemethods and procedures that are capable of producing afunctional product.This guide identifies favorable riprap quali-ties and recommends practices best suited to obtain thosequalities.The production of rock,use of recycled materials,rock with cut dimensions,and engineering and revetmentdesign
4、 are beyond the scope of this guide.Special forms ofriprap,including hand placed riprap,grouted riprap,or keyed(plated)riprap that is tamped into place to smooth the surface,are also beyond the scope of this guide.1.2 This guide offers an organized collection of informationor a series of options and
5、 does not recommend a specific courseof action.This document cannot replace education or experi-ence and should be used in conjunction with professionaljudgment.Not all aspects of this guide may be applicable in allcircumstances.This ASTM standard is not intended to repre-sent or replace the standar
6、d of care by which the adequacy ofa given professional service must be judged,nor should thisdocument be applied without consideration of a projects manyunique aspects.The word“Standard”in the title of thisdocument means only that the document has been developedand approved through the ASTM consensu
7、s process1.3 UnitsThe values stated in SI units are to be regardedas standard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.4 This standard may involve hazardous operations andequipment.This standard does not purport to address all
8、of thesafety concerns,if any,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.1.5 This international standard was developed in accor
9、-dance with internationally recognized 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 Sta
10、ndards:2C33/C33M Specification for Concrete AggregatesC136/C136M Test Method for Sieve Analysis of Fine andCoarse AggregatesD75/D75M Practice for Sampling AggregatesD653 Terminology Relating to Soil,Rock,and ContainedFluidsD4992 Practice for Evaluation of Rock to be Used forErosion ControlD5519 Test
11、 Methods for Particle Size Analysis of Naturaland Man-Made Riprap MaterialsD6092 Practice for Specifying Standard Sizes of Stone forErosion Control2.2 AASHTO Standard:3M 288 Geotextile Specification for Highway Applications3.Terminology3.1 DefinitionsFor definitions of common technical termsused in
12、this standard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 bedding,nan aggregate mixture placed below theriprap.3.2.1.1 DiscussionBedding material is usually sand andgravel sized,but may include cobble sized material.If placedwithout a geotextile,the bedding mat
13、erial may be used as afilter.If placed in conjunction with a geotextile,the beddingmay provide a cushion for protection of the geotextile duringriprap placement and provide confinement of the geotextile.Itis possible to have more than one bedding layer.1This guide is under the jurisdiction ofASTM Co
14、mmittee D18 on Soil and Rockand is the direct responsibility of Subcommittee D18.17 on Rock for ErosionControl.Current edition approved Nov.1,2021.Published November 2021.Originallyapproved in 2002.Last previous edition approved in 2014 as D6825 141.DOI:10.1520/D6825-21.2For referenced ASTM standard
15、s,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.3Available from American Association of State Highway and TransportationOfficials(AASHTO),444 N
16、.Capitol St.,NW,Suite 249,Washington,DC 20001,http:/www.transportation.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 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
