ASTM_D_6825_-_14.pdf

Designation:D682514Standard 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 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 diversemethods 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 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 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 standard 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 consensus process1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.1.4 This standard may involve hazardous operations andequipment.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 requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC136 Test Method for Sieve Analysis of Fine and CoarseAggregatesD75 Practice for Sampling AggregatesD653 Terminology Relating to Soil,Rock,and ContainedFluidsD4992 Practice for Evaluation of Rock to be Used forErosion ControlD5519 Test 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 DefinitionsSee Terminology D653 for general defini-tions.3.2 Definitions of Terms Specific to This Standard:3.2.1 beddingan aggregate mixture placed below the rip-rap.Bedding material is usually sand and gravel sized,but mayinclude cobble sized material.If placed without a geotextile,the bedding material may be used as a filter.If placed inconjunction with a geotextile,the bedding may provide acushion for protection of the geotextile during riprap placementand provide confinement of the geotextile.It is possible to havemore than one bedding layer.3.2.2 chinkingthe practice of filling riprap surface voidswith smaller sized rock or aggregate.3.2.3 clam shella bucket tool that is operated from adragline or crane.The bucket is hinged at the top and openslike a clam so that rock can be placed without dropping it.3.2.4 Dxthe particle diameter at which x%by weight(dry)of the particles of a particular sample are finer.1This guide is under the jurisdiction ofASTM Committee D18 on Soil and Rockand is the direct responsibility of Subcommittee D18.17 on Rock for ErosionControl.Current edition approved Feb.1,2014.Published March 2014.Originallyapproved in 2002.Last previous edition approved in 2008 as D6825 02(Reap-proved 2008)1.DOI:10.1520/D6825-14.2For 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.3Available from American Association of State Highway and TransportationOfficials(AASHTO),444 N.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 States1 3.2.5 filterany substance,as geotextile or layer of sand/aggregate,placed to provide separation and retention ofmaterials,while allowing water to pass.3.2.6 floatera individual rock within the riprap layer thatis not interlocked with the