1、Designation:D75/D75M19American Association StateHighway and TransportationOfficials StandardAASHTO No.:T2Standard Practice forSampling Aggregates1This standard is issued under the fixed designation D75/D75M;the number immediately following the designation indicates the yearof original adoption or,in
2、 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.1.Scope*1.1 This practice covers sampling of coarse and fine aggre-gates for the following purposes
3、:1.1.1 Preliminary investigation of the potential source ofsupply,1.1.2 Control of the product at the source of supply,1.1.3 Control of the operations at the site of use,and1.1.4 Acceptance or rejection of the materials.NOTE1Sampling plans and acceptance and control tests vary with thetype of constr
4、uction in which the material is used.1.2 The text of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.1.3 The values stated in either SI units or inch-
5、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 in nonconformancewith the standard.NOTE2The quality of the results produced
6、by this standard aredependent on the competence of the personnel performing the procedureand the capability,calibration,and maintenance of the equipment used.Agencies that meet the criteria of Specification D3666 are generallyconsidered capable of competent and objective testing,sampling,inspection,
7、etc.Users of this standard are cautioned that compliance withSpecification D3666 alone does not completely ensure reliable results.Reliable results depend on many factors;following the suggestions ofSpecification D3666 or some similar acceptable guideline provides ameans of evaluating and controllin
8、g some of those factors.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 to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limit
9、ations prior to use.1.5 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 Organization T
10、echnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C702/C702M Practice for Reducing Samples of Aggregateto Testing SizeD8 Terminology Relating to Materials for Roads and Pave-mentsD2234/D2234M Practice for Collection of a Gross Sampleof CoalD3665 Practice for Random Sa
11、mpling of Construction Ma-terialsD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsE105 Practice for Probability Sampling of MaterialsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristi
12、c of aLot or ProcessE141 Practice for Acceptance of Evidence Based on theResults of Probability Sampling3.Terminology3.1 DefinitionsFor definitions of terms used in thispractice,refer to Terminology D8.4.Significance and Use4.1 Sampling is equally as important as the testing,and thesampler shall use
13、 every precaution to obtain samples that willshow the nature and condition of the materials which theyrepresent.4.2 Samples for preliminary investigation tests are obtainedby the party responsible for development of the potential1This practice is under the jurisdiction of ASTM Committee D04 on Road
14、andPaving Materials and is the direct responsibility of Subcommittee D04.30 onMethods of Sampling.Current edition approved Nov.1,2019.Published November 2019.Originallyapproved in 1920.Last previous edition approved in 2014 as D75/D75M 14.DOI:10.1520/D0075_D0075M-19.2For referenced ASTM standards,vi
15、sit 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 B
16、arr 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 source(Note 3).Samples of materials for control of theproduction at the source or control of the work at the s
