ASTM_D_7313_-_20.pdf

Designation:D731320Standard Test Method forDetermining Fracture Energy of Asphalt Mixtures Using theDisk-Shaped Compact Tension Geometry1This standard is issued under the fixed designation D7313;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 determination of fractureenergy(Gf)of asphalt mixtures using the disk-shaped compacttension geometry.The disk-shaped compact tension geometryis a circular specimen with a single edge notch loaded intension.The fracture energy can be utilized as a parameter todescribe the fracture resistance of asphalt mixtures.Thefracture energy parameter is particularly useful in the evalua-tion of asphalt mixtures with ductile asphalt binders,such aspolymer-modified asphalt mixture,and has been shown todiscriminate between these materials more broadly than theindirect tensile strength parameter(AASHTO T 322,Ref(1).2The test is generally valid at temperatures of 10 C and below,or for material and temperature combinations which producevalid material fracture,as outlined in 7.4.1.2 The specimen geometry and terminology(disk-shapedcompact tension,DC(T)is modeled after Test Method E399for Plane-Strain Fracture Toughness of Metallic Materials,Appendix A6,with modifications to allow fracture testing ofasphalt mix.1.3 The test method describes the testing apparatus,instrumentation,specimen fabrication,and analysis proceduresrequired to determine fracture energy of asphalt mixture andsimilar quasi-brittle materials.1.4 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 test method.1.5 The values stated in SI units are to be regarded as thestandard.No other units of measurement are included in thisstandard.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:3D8 Terminology Relating to Materials for Roads and Pave-mentsD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD6925 Test Method for Preparation and Determination ofthe Relative Density of Asphalt Mix Specimens by Meansof the Superpave Gyratory CompactorD7643 Practice for Determining the Continuous GradingTemperatures and Continuous Grades for PG GradedAsphalt BindersE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE399 Test Method for Linear-Elastic Plane-Strain FractureToughness of Metallic MaterialsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE1823 Terminology Relating to Fatigue and Fracture Testing2.2 AASHTO Standards:4AASHTO T 322 Method of Test for Determining the CreepCompliance and Strength of Hot Mix Asphalt(HMA)Using the Indirect Tensile Test DeviceAASHTO R 30 Practice for Mixture Conditioning of Hot-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 D04.26 onFundamental/Mechanistic Tests.Current edition approved Dec.15,2020.Published January 2021.Originallyapproved in 2007.Last previous edition approved in 2013 as D7313 13.DOI:10.1520/D7313-20.2The boldface numbers in parentheses refer to a list of references at the end ofthis standard.3For 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.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.13.Terminology3.1 Definiti