ASTM_D_6925_-_15.pdf

Designation:D692515Standard Test Method forPreparation and Determination of the Relative Density ofAsphalt Mix Specimens by Means of the SuperpaveGyratory Compactor1This standard is issued under the fixed designation D6925;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the compaction of asphalt mixinto cylindrical specimens using the Superpave GyratoryCompactor(SGC).This standard also refers to the determina-tion of the relative density of the compacted specimens at anypoint in the compaction process.Compacted specimens aresuitable for volumetric,physical property,and mechanicaltesting.Smaller specimens may be cut from the compactedcylindrical specimen for specific test specimen geometryrequirements.The compaction procedures apply to LaboratoryMix Laboratory Compacted(LMLC)and Plant Mix Labora-tory Compacted(PMLC)asphalt mix.1.2 The values stated in SI units are to be regarded asstandard.The value given in degrees for the angle of gyrationis a mathematical conversion from the SI units and is providedfor information regarding the commonly used unit of degree.1.3 The text of this test method references notes andfootnotes which provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of 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 to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D8 Terminology Relating to Materials for Roads and Pave-mentsD979/D979M Practice for Sampling Bituminous PavingMixturesD1188 Test Method for Bulk Specific Gravity and Density ofCompacted Bituminous Mixtures Using Coated SamplesD2041 Test Method for Theoretical Maximum SpecificGravity and Density of Bituminous Paving MixturesD2726 Test Method for Bulk Specific Gravity and Densityof Non-Absorptive Compacted Bituminous MixturesD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD4402 Test Method for Viscosity Determination of Asphaltat Elevated Temperatures Using a Rotational ViscometerD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD6752/D6752M Test Method for Bulk Specific Gravity andDensity of Compacted Bituminous Mixtures Using Auto-matic Vacuum Sealing MethodD6857/D6857M Test Method for Maximum Specific Grav-ity and Density of Bituminous Paving Mixtures UsingAutomatic Vacuum Sealing MethodD7115 Test Method for Measurement of Superpave Gyra-tory Compactor(SGC)Internal Angle of Gyration UsingSimulated LoadingE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids2.2 AASHTO Standards:3PP35 Provisional Practice for Evaluation of Superpave Gy-ratory Compactors(SGCs)PP76 Standard Practice for Troubleshooting Asphalt Speci-men Volumetric Differences between Superpave GyratoryCompactors(SGCs)Used in the Design and the FieldManagement of Superpave MixturesR30 Standard Practice for Mixture Conditioning of Hot MixAsphalt(HMA)R35 Standard Practice for Superpave Volumetric Design forHot Mix Asphalt(HMA)1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.20 onMechanical Tests of Asphalt Mixtures.Current edition approved Jan.1,2015.Published January 2015.Originallyapproved in 2003.Last previous edition approved in 2009 as D6925 09.DOI:10.1520/D6925-15.2For 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 TransportationOfficials(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 States1 R47 Standard Practice for Reducing Samples of Hot MixAsphalt(HMA)to Testing SizeT312 Standard Method of Test for Preparing and Determin-ing the Density of Hot-MixAsphalt(HMA)Specimens byMeans of the Superpave Gyratory Compactor32.3 Other References:ASMEB46.1 SurfaceTexture(SurfaceRoughness,Waviness,and Lay)4Asphalt Institute MS-2 Mix Design Methods for AsphaltConcrete53.Terminology3.1 This test method uses terms as defined by TerminologyD8.3.2 Definitions of Terms Specific to This Standard:3.2.1 lab mix lab compacted(LMLC)asphalt mixture,nas