ASTM_D_6752_-_D_6752M_-_18.pdf

Designation:D6752/D6752M18Standard Test Method forBulk Specific Gravity and Density of Compacted AsphaltMixtures Using Automatic Vacuum Sealing Method1This standard is issued under the fixed designation D6752/D6752M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of bulkspecific gravity of compacted asphalt mixtures by the vacuumsealing method.1.2 This method can be used for compacted cylindrical andcubical laboratory and field asphalt mixture specimens.1.3 The bulk specific gravity of the compacted asphaltmixtures may be used in calculating the unit weight of themixture.1.4 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 in nonconformancewith the standard.1.5 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.1.6 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 limitations prior to use.1.7 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 TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD8 Terminology Relating to Materials for Roads and Pave-mentsD2726/D2726M Test Method for Bulk Specific Gravity andDensity of Non-Absorptive Compacted Asphalt MixturesD3203/D3203M Test Method for Percent Air Voids in Com-pacted Asphalt MixturesD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD5361/D5361M Practice for Sampling Compacted AsphaltMixtures for Laboratory TestingD7227/D7227M Practice for Rapid Drying of CompactedAsphalt Mixture Specimens Using Vacuum Drying Appa-ratus2.2 AASHTO Standard:3M323 Standard Specification for Superpave Mix Design3.Terminology3.1 For definitions of terms used in this standard,refer toTerminology D8.4.Significance and Use4.1 The results obtained from this method can be used todetermine the unit weight of compacted asphalt mixtures,andin conjunction with Test Method D3203/D3203M,to obtain1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.21 onSpecific Gravity and Density of Asphalt Mixtures.Current edition approved Aug.15,2018.Published August 2018.Originallyapproved in 2002.Last previous edition approved in 2017 as D6752/D6752M 17.DOI:10.1520/D6752_D6752M-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 Document Summary page onthe ASTM website.3Available from the American Association of State Highway TransportationOfficials(AASHTO),441 N.Capitol Street,NW,Washington,DC 20001.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 percent air voids.These values in turn may be used indetermining the relative degree of compaction.4.2 Since specific gravity has no units,it must be convertedto density in order to do calculations that require units.Thisconversion is made by multiplying the specific gravity at agiven temperature by the density of water at the same tempera-ture.4.3 This method can be used for 100 mm 4 in.and150 mm 6 in.diameter cylindrical as well as cubical asphaltmixture specimens to correct for inconsistencies in sampleweight determinations resulting from drainage of water fromsamples and inaccuracy in saturated surface dry weight ofabsorptive coarse and op