ASTM_C_31-C31M-18.pdf

This international standard was developed in accordance with internationally recgnized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.Designation:C31/C31M-18NTERNATIONALStandard Practice forMaking and Curing Concrete Test Specimens in the Field1This standard is issued under the fixed designation C31/C31M;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(e)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*2.Referenced Documents1.1 This practice covers procedures for making and curing2.1 ASTM Standards:3cylinder and beam specimens from representative samples ofC125 Terminology Relating to Concrete and Concrete Ag-fresh concrete for a construction project.gregates1.2 The concrete used to make the molded specimens shallC138/C138M Test Method for Density(Unit Weight).Yield,be sampled after all on-site adjustments have been made to theand Air Content(Gravimetric)of Concretemixture proportions,including the addition of mix water andC143/C143M Test Method for Slump of Hydraulic-Cementadmixtures.This practice is not satisfactory for making speci-Concretemens from concrete not having measurable slump or requiringC172/C172M Practice for Sampling Freshly Mixed Con-other sizes or shapes of specimens.crete1.3 The values stated in either SI units or inch-pound unitsC173/C173M Test Method for Air Content of Freshly Mixedare to be regarded separately as standard.The values stated inConcrete by the Volumetric Methodeach system may not be exact equivalents;therefore,eachC231/C231M Test Method for Air Content of Freshly Mixedsystem shall be used independently of the other.CombiningConcrete by the Pressure Methodvalues from the two systems may result in non-conformanceC330/C330M Specification for Lightweight Aggregates forwith the standard.Structural Concrete1.4 This standard does not purport to address all of theC403/C403M Test Method for Time of Setting of Concretesafety concerns,if any,associated with its use.It is theMixtures by Penetration Resistanceresponsibility of the user of this standard to establish appro-C470/C470M Specification for Molds for Forming Concretepriate safery,health,and environmental practices and deter-Test Cylinders Verticallymine the applicability of regulatory limitations prior to use.C511 Specification for Mixing Rooms,Moist Cabinets,(Warning-Fresh hydraulic cementitious mixtures are causticMoist Rooms,and Water Storage Tanks Used in theand may cause chemical burns to exposed skin and tissue uponTesting of Hydraulic Cements and Concretesprolonged exposure.2)C617/C617M Practice for Capping Cylindrical Concrete1.5 The text of this standard references notes which provideSpecimensexplanatory material.These notes shall not be considered asC1064/C1064M Test Method for Temperature of Freshlyrequirements of the standard.Mixed Hydraulic-Cement Concrete1.6 This international standard was developed in accor-C1077 Practice for Agencies Testing Concrete and Concretedance with internationally recognized principles on standard-Aggregates for Use in Construction and Criteria forization established in the Decision on Principles for theTesting Agency EvaluationDevelopment of International Standards,Guides and Recom-C1758/C1758M Practice for Fabricating Test Specimensmendations issued by the World Trade Organization Technicalwith Self-Consolidating ConcreteBarriers to Trade(TBT)Committee.2.2 American Concrete Institute Publication:309R Guide for Consolidation of ConcreteI This practice is under the jurisdiction of ASTM Committee C09 on Concreteand Concrete Aggregates and is the direct responsibility of Subcommittee C09.61on Testing for Strength.3 For referenced ASTM standards,visit the ASTM website,www.astm.org,orCurrent edition approved Jan.1.2018.Published February 2018.Originallycontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMapproved in 1920.Last previous edition approved in 2017 as C31/C31M-17.DOI:Standards volume information,refer to the standards Document Summary page on10.1520/C0031C0031M-18.the ASTM website.2 See Section on Safety Precautions,Manual of Aggregate and Concrete Testing.4 Available from American Concrete Institute(ACI),P.O.Box 9094,FarmingtonAnnual Book of ASTM Standards,Vol.04.02.Hills,MI 48333-9094,http:/www.aci-int.ong.*A Summary of Changes section appears at the end of this standardCopyright ASTM Intemational,100 Barr Harbor Drive,PO Box C700.West Conshohocken.PA 19428-2959.United States