1、Designation:D979/D979M22Standard Practice forSampling Asphalt Mixtures1This standard is issued under the fixed designation D979/D979M;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 i
2、ndicates 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.Scope1.1 This practice covers sampling of asphalt mixtures atpoints of manufacture,st
3、orage,delivery,or in place.1.2 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;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result
4、in nonconformancewith the standard.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 regul
5、atory 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 Org
6、anization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D8 Terminology Relating to Materials for Roads and Pave-mentsD2041/D2041M Test Method for Theoretical MaximumSpecific Gravity and Density of Asphalt MixturesD2234/D2234M Practice for Collection of a Gross Sa
7、mpleof CoalD2726/D2726M Test Method for Bulk Specific Gravity andDensity of Non-Absorptive Compacted Asphalt MixturesD3665 Practice for Random Sampling of Construction Ma-terialsD5361/D5361M Practice for Sampling Compacted AsphaltMixtures for Laboratory TestingD5444 Test Method for Mechanical Size A
8、nalysis of Ex-tracted AggregateD6307 Test Method for Asphalt Content of Asphalt Mixtureby Ignition MethodD6925 Test Method for Preparation and Determination ofthe Relative Density of Asphalt Mix Specimens by Meansof the Superpave Gyratory CompactorD6926 Practice for Preparation of Asphalt Mixture Sp
9、eci-mens Using Marshall ApparatusD6927 Test Method for Marshall Stability and Flow ofAsphalt MixturesE105 Guide for Probability Sampling of MaterialsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE141 Practice for Acce
10、ptance of Evidence Based on theResults of Probability Sampling2.2 AASHTO Standard:3AASHTO R 47 Standard Practice for Reducing Samples ofHot Mix Asphalt(HMA)to Testing Size3.Terminology3.1 This standard uses terms as defined by Terminology D8.3.2 Definitions of Terms Specific to This Standard:3.2.1 f
11、ield sample,na quantity of the material to be testedof sufficient size to provide an acceptable estimate of theaverage quality of a unit.3.2.2 increment,npart of a sample.3.2.3 lot,na sizable isolated quantity of bulk materialfrom a single source,assumed to have been produced by thesame process(for
12、example,a days production or a specificmass or volume).3.2.4 test portion,na quantity of the material of sufficientsize extracted from the larger field sample by a proceduredesigned to ensure accurate representation of the field sample,and thus of the unit sampled.1This practice is under the jurisdi
13、ction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.30 onMethods of Sampling.Current edition approved Nov.1,2022.Published November 2022.Originallyapproved in 1948.Last previous edition approved in 2015 as D979/D979M 15.DOI:10.1520/D0979_D0979
14、M-22.2For 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.3Available from American Association of State Highway and Tra
15、nsportationOfficials(AASHTO),444 N.Capitol St.,NW,Suite 249,Washington,DC 20001,http:/www.transportation.org.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 recogn
16、ized 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.13.2.5 unit,na batch or finite subdivision of a lot of bulkmaterial(for example,a truck load or a specific area covered).4.Significance and Use4.1 General:4.1.1 Sampling is equally as important as the testing,andthe sampler shall take every precaution to obtain samples
