1、Designation:C917/C917M18Standard Test Method forEvaluation of Variability of Cement from a Single SourceBased on Strength1This standard is issued under the fixed designation C917/C917M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,
2、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.1.Scope1.1 This test method covers a procedure for determining thevariability of a hydraulic cement produced at a single
3、sourceusing strength tests as the characteristic property.It is intendedthat this test method normally be used for the predominantcement manufactured at a cement plant.Guidelines forsampling,testing,presentation of results,and evaluation aregiven.1.2 The values stated in either SI units or inch-poun
4、d unitsare to be regarded separately as the standard.The values statedin each system may not be exact equivalents;therefore eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.One system of units is used in the Figur
5、e andTables in this standard to illustrate the calculation methods thatare applicable independent of the system of units.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-pria
6、te 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 theDevelopmen
7、t of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C150 Specifi
8、cation for Portland CementC219 Terminology Relating to Hydraulic CementC595 Specification for Blended Hydraulic CementsC1157 Performance Specification for Hydraulic CementC1451 Practice for Determining Variability of Ingredients ofConcrete From a Single SourceE456 Terminology Relating to Quality and
9、 Statistics3.Terminology3.1 DefinitionsFor definitions of terms relating to this testmethod,refer to Practice C1451 and Terminologies C219 andE456.4.Significance and Use4.1 This test method is designed to present in a standardizedformat information on the variability of strength of cementfrom a sing
10、le source over a period of time.It can be applied toall hydraulic cements covered in Specifications C150,C595,and C1157.The results derived from this test method areintended for information only and are not requirements of anyexisting ASTM specification.A specification may refer to thistest method t
11、o obtain information on the variability of cementfrom a single source.4.2 The procedure is based on obtaining samples fromlocations during the delivery of cement to the user and is morerepresentative of the variability of cement used in concreteproduction than test data reported on mill test reports
12、.Variationdetermined from the test results is corrected for testing error,therefore giving the user one indicator of the source variationof the cement.NOTE1It should be recognized that concrete strength variability isinfluenced by other factors in addition to cement strength variability.4.3 This tes
13、t method does not provide information on therelationship between the variability of cement and the variabil-ity of concrete properties.The user can,along with supplemen-tary information or correlative testing of concrete properties,develop quantitative estimates of the effects.5.Sampling5.1 Establis
14、h a sampling plan that includes the lot size,sampling frequency,location and procedure of sampling,and1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.27 on Strength.Current edition approved Jan.1,2018.Published January 2
15、018.Originallyapproved in 1979.Last previous edition approved in 2011 as C917 05(2011).DOI:10.1520/C0917-18.2For 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
16、 Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 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 handling and retention of samples.
