1、Designation:C31/C31M17Standard 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.
2、A number in parentheses indicates the year of last reapproval.Asuperscript 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 practice covers procedures for making and curi
3、ngcylinder and beam specimens from representative samples offresh concrete for a construction project.1.2 The concrete used to make the molded specimens shallbe sampled after all on-site adjustments have been made to themixture proportions,including the addition of mix water andadmixtures.This pract
4、ice is not satisfactory for making speci-mens from concrete not having measurable slump or requiringother sizes or shapes of specimens.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;th
5、erefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 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
6、to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.(WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to exposed skin and tissue upon prolongedexposure.2)1.5 The text of this standard referen
7、ces notes which provideexplanatory material.These notes shall not be considered asrequirements of the standard.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of I
8、nternational Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3C125 Terminology Relating to Concrete and Concrete Ag-gregatesC138/C138M Test Method for Density(Unit Weight),Yield,and Air Con
9、tent(Gravimetric)of ConcreteC143/C143M Test Method for Slump of Hydraulic-CementConcreteC172/C172M Practice for Sampling Freshly Mixed Con-creteC173/C173M Test Method forAir Content of Freshly MixedConcrete by the Volumetric MethodC231/C231M Test Method forAir Content of Freshly MixedConcrete by the
10、 Pressure MethodC330/C330M Specification for Lightweight Aggregates forStructural ConcreteC403/C403M Test Method for Time of Setting of ConcreteMixtures by Penetration ResistanceC470/C470M Specification for Molds for Forming ConcreteTest Cylinders VerticallyC511 Specification for Mixing Rooms,Moist
11、Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC617/C617M Practice for Capping Cylindrical ConcreteSpecimensC1064/C1064M Test Method for Temperature of FreshlyMixed Hydraulic-Cement ConcreteC1077 Practice for Agencies Testing Concrete and ConcreteAg
12、gregates for Use in Construction and Criteria forTesting Agency EvaluationC1758/C1758M Practice for Fabricating Test Specimenswith Self-Consolidating Concrete2.2 American Concrete Institute Publication:4309R Guide for Consolidation of Concrete1This practice is under the jurisdiction of ASTM Committe
13、e C09 on Concreteand Concrete Aggregates and is the direct responsibility of Subcommittee C09.61on Testing for Strength.Current edition approved June 15,2017.Published July 2017.Originallyapproved in 1920.Last previous edition approved in 2015 as C31/C31M15a1.DOI:10.1520/C0031_C0031M-17.2See Section
14、 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 Doc
15、ument Summary page onthe ASTM website.4Available from American Concrete Institute(ACI),P.O.Box 9094,FarmingtonHills,MI 48333-9094,http:/www.aci-int.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
16、 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 Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.Terminology3.1 For definitions of terms used in this practice,refer toTerminology C125.4.Significance and Use4.1 This practice provides standardized requirem