ASTM_D_6684_-_18.pdf

Designation:D668418Standard Specification forMaterials and Manufacture of Articulating Concrete Block(ACB)Systems1This standard is issued under the fixed designation D6684;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 The purpose of this standard is to provide specificationsfor articulating concrete block(ACB)revetment system struc-turalcomponents,materialcompositionandphysicalproperties,manufacturing methods and testing requirements.1.2 UnitsThe values stated in inch-pound units are to beregarded as standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.Reporting oruse of units other than inch-pound shall not be regarded asnon-conformance with this standard.1.2.1 The gravitational system of inch-pound units is usedwhen dealing with inch-pound units.In the system,the pound(lbf)represents a unit of force(weight),while the units formass is slugs.The slug unit is not given,unless dynamic(F=ma)calculations are involved.1.2.2 The SI units presented for apparatus are substitutionsof the inch-pound units,other similar SI units should beacceptable providing they meet the technical requirementsestablished by the inch-pound apparatus.1.2.3 It is common practice in the engineering/constructionprofession to concurrently use pounds to represent both a unitof mass(lbm)and of force(lbf).This practice implicitlycombines two separate systems of units;the absolute and thegravitational systems.It is scientifically undesirable to com-bine the use of two separate sets of inch-pound units within asingle standard.As stated,this standard includes the gravita-tional system of inch-pound units and does not use/present theslug unit of mass.However,the use of balances and scalesrecording pounds of mass(lbm)or recording density in lbm/ft3shall not be regarded as nonconformance with this standard.1.2.4 The terms density and unit weight are often usedinterchangeably.Density is mass per unit volume,whereas unitweight is force per unit volume.In this standard,density isgiven only in SI units.After the density has been determined,the unit weight is calculated in SI or inch-pound units,or both.1.2.5 Calculations are done using only one set of units;either SI or gravitational inch-pound.Other units are permis-sible provided appropriate conversion factors are used tomaintain consistency of units throughout the calculations,andsimilar significant digits or resolution,or both are maintained.1.3 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-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 Standards:2C33/C33M Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC42/C42M Test Method for Obtaining and Testing DrilledCores and Sawed Beams of ConcreteC67/C67M Test Methods for Sampling and Testing Brickand Structural Clay TileC140/C140M Test Methods for Sampling and Testing Con-crete Masonry Units and Related UnitsC150/C150M Specification for Portland CementC207 Specification for Hydrated Lime for Masonry Pur-posesC331/C331M Specification for Lightweight Aggregates forConcrete Masonry UnitsC595/C595M Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC666/C666M Test Method for Resistance of Concrete to1This specification is under the jurisdiction of ASTM Committee D18 on Soiland Rock and is the direct responsibility of Subcommittee D18.25 on Erosion andSediment Control Technology.Current edition approved Dec.1,2018.Published December 2018.Originallyapproved in 2001.Last previous edition approved in 2010 as D668404(2010).DOI:10.1520/D6684-18.2For 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.*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 recogni