ASTM_C_685_-_C_685M_-_14.pdf

Designation:C685/C685M14Standard Specification forConcrete Made by Volumetric Batching and ContinuousMixing1This standard is issued under the fixed designation C685/C685M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This specification covers concrete made from materialscontinuously batched by volume,mixed in a continuous mixer,and delivered to the purchaser in a freshly mixed and unhard-ened state as hereinafter specified.Requirements for quality ofconcrete shall be either as hereinafter specified or as specifiedby the purchaser.When the requirements of the purchaser differfrom this specification,the purchasers specification shallgovern.This specification does not cover the placement,consolidation,finishing,curing,or protection of the concreteafter delivery to the purchaser.Tests and criteria for batchingaccuracy and mixing efficiency are specified herein.1.2 The values stated in either SI units,shown in brackets,or inch-pound units are to be regarded separately as standard.The values stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in noncon-formance with the standard.1.3 This specification references notes and footnotes whichprovide explanatory material.These notes and footnotes(ex-cluding those in tables and figures)shall not be considered asrequirements of this specification.1.4 This standard does not purport to address all the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.(WarningFresh hydraulic cementi-tious mixtures are caustic and may cause chemical burns toskin and tissue upon prolonged use.2)2.Referenced Documents2.1 ASTM Standards:3C31/C31M Practice for Making and Curing Concrete TestSpecimens in the FieldC33 Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC94/C94M Specification for Ready-Mixed ConcreteC125 Terminology Relating to Concrete and Concrete Ag-gregatesC127 Test Method for Density,Relative Density(SpecificGravity),and Absorption of Coarse AggregateC136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC138/C138M Test Method for Density(Unit Weight),Yield,and Air Content(Gravimetric)of ConcreteC143/C143M Test Method for Slump of Hydraulic-CementConcreteC150/C150M Specification for Portland CementC173/C173M Test Method forAir Content of Freshly MixedConcrete by the Volumetric MethodC231 Test Method for Air Content of Freshly Mixed Con-crete by the Pressure MethodC260 Specification for Air-Entraining Admixtures for Con-creteC330 Specification for Lightweight Aggregates for Struc-tural ConcreteC494/C494M Specification for Chemical Admixtures forConcreteC567 Test Method for Determining Density of StructuralLightweight ConcreteC595/C595M Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in Concrete1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.40 on Ready-Mixed Concrete.Current edition approved Dec.15,2014.Published February 2015.Originallyapproved in 1971.Last previous edition approved in 2011 as C685/C685M11.DOI:10.1520/C0685_C0685M-14.2See Section on Safety Precautions,Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards,Vol 04.02.3For 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 States1 C637 Specification for Aggregates for Radiation-ShieldingConcreteC989/C989M Specification for Slag Cement for Use inConcrete and MortarsC1017/C1017M Specification for Chemical Admixtures forUse in Producing Flowing ConcreteC1064/C1064M Test Method for Temperature of FreshlyMixed Hydraulic-Cement ConcreteC1077 Practice for Agencies Testing Concrete and ConcreteAggregates for Use in Construction and Criteria forTesting Agency EvaluationC1157/C1157M Performance Specification for HydraulicCementC1240 Specification for Silica Fume Used in CementitiousMixturesC1602/C1602M Specification for Mixing Water Used in theProduction of Hydraulic Cement Concrete2.2 ACI Documents:4CP-