ASTM_D_6521_-_22.pdf

Designation:D652122Standard Practice forAccelerated Aging of Asphalt Binder Using a PressurizedAging Vessel(PAV)1This standard is issued under the fixed designation D6521;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 practice covers the conditioning of asphalt bindersto simulate accelerated aging(oxidation)by means of pressur-ized air and elevated temperature.This is intended to simulatethe changes in rheology which occur in asphalt binders duringin-service oxidative aging,but may not accurately simulate therelative rates of aging.It is normally intended for use withresidue from Test Method D2872(RTFOT),which is designedto simulate plant aging.NOTE1PAV conditioning has not been validated for materialscontaining particulate materials.1.2 The aging of asphalt binders during service is affectedby ambient temperature and by mixture-associated variables,such as the volumetric proportions of the mix,the permeabilityof the mix,properties of the aggregates,and possibly otherfactors.This conditioning process is intended to provide anevaluation of the relative resistance of different asphalt bindersto oxidative aging at selected elevated aging temperatures andpressures,but cannot account for mixture variables or providethe relative resistance to aging at in-service conditions.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 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 standardNOTE2The quality of the results produced 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,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 controlling some of those factors.1.5 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.1.6 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:2D8 Terminology Relating to Materials for Roads and Pave-mentsD2872 Test Method for Effect of Heat and Air on a MovingFilm of Asphalt Binder(Rolling Thin-Film Oven Test)D3666 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 TestingD6373 Specification for Performance-Graded AsphaltBinderD8239 Specification for Performance-Graded AsphaltBinder Using the Multiple Stress Creep and Recovery(MSCR)TestE1137/E1137M Specification for Industrial Platinum Resis-tance Thermometers2.2 AASHTO Standards:3M 320 Specification for Performance-Graded AsphaltBinderM 332 Specification for Performance-Graded Asphalt1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.46 onDurability and Distillation Tests.Current edition approved May 1,2022.Published June 2022.Originallyapproved in 2000.Last previous edition approved in 2019 as D6521 19a.DOI:10.1520/D6521-22.2For 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles