ASTM_D_6931_-_17.pdf

Designation:D693117Standard Test Method forIndirect Tensile(IDT)Strength of Asphalt Mixtures1This standard is issued under the fixed designation D6931;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 procedures for preparing andtesting laboratory-fabricated or field-recovered cores of asphaltmixtures to determine the indirect tensile(IDT)strength.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 and health practices and determine the applica-bility 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 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:2D1074 Test Method for Compressive Strength of AsphaltMixturesD1561/D1561M Practice for Preparation of BituminousMixture Test Specimens by Means of California KneadingCompactorD3387 Test Method for Compaction and Shear Properties ofBituminous Mixtures by Means of the U.S.Corps ofEngineers Gyratory Testing Machine(GTM)D3496 Practice for Preparation of Bituminous MixtureSpecimens for Dynamic Modulus Testing(Withdrawn2010)3D3549/D3549M Test Method for Thickness or Height ofCompacted Bituminous Paving Mixture SpecimensD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD4013 Practice for Preparation of Test Specimens of Bitu-minous Mixtures by Means of Gyratory Shear Compactor(Withdrawn 2013)3D4867/D4867M Test Method for Effect of Moisture onAsphalt Concrete Paving MixturesD5581 Test Method for Resistance to Plastic Flow of Bitu-minous Mixtures Using Marshall Apparatus(6 inch-Diameter Specimen)D6925 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 Speci-mens Using Marshall ApparatusD6927 Test Method for Marshall Stability and Flow ofAsphalt MixturesE1 Specification for ASTM Liquid-in-Glass Thermometers2.2 AASHTO Standards:4AASHTO T 245 Standard Method for Resistance to PlasticFlow of Bituminous Mixtures Using Marshall ApparatusAASHTO T 312 Standard Method for Preparing and Deter-mining the Density of Hot Mix Asphalt(HMA)Speci-mens by Means of the Superpave Gyratory Compactor3.Summary of Test Method3.1 The IDT strength of asphalt mixtures is determined byloading a cylindrical specimen across its vertical diametralplane at a specified rate of deformation and test temperature.The peak load at failure is recorded and used to calculate theIDT strength of the specimen.4.Significance and Use4.1 The values of IDT strength may be used to evaluate therelative quality of asphalt mixtures in conjunction with labo-ratory mix design testing and for estimating the potential forrutting or cracking.The results can also be used to determine1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.26 onFundamental/Mechanistic Tests.Current edition approved July 1,2017.Published July 2017.Originally approvedin 2007.Last previous edition approved in 2012 as D6931 12.DOI:10.1520/D6931-17.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available 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 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 the potential for field pavement moisture damage when resultsare obtained on both moisture-conditioned and unconditionedspecimens.NOTE1The quality of the results produced by this standard aredependent on the com