ASTM_D_6927_-_22.pdf

Designation:D692722Standard Test Method forMarshall Stability and Flow of Asphalt Mixtures1This standard is issued under the fixed designation D6927;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 measurement of resistance toplastic flow of 4 in.(102 mm)cylindrical specimens of asphaltmixture loaded in a direction perpendicular to the cylindricalaxis by means of the Marshall apparatus.This test method isfor use with dense-graded asphalt mixtures prepared withasphalt binder(modified and unmodified)with maximum sizeaggregate up to 1 in.(25 mm)in size(passing 1 in.(25 mm)sieve).1.2 UnitsThe values stated in inch-pound units are to beregarded as standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.3 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.1.4 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 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-mentsD1188/D1188M Test Method for Bulk Specific Gravity andDensity of Compacted Asphalt Mixtures Using CoatedSamplesD2726/D2726M Test Method for Bulk Specific Gravity andDensity of Non-Absorptive Compacted Asphalt MixturesD3549/D3549M Test Method for Thickness or Height ofCompacted Asphalt Mixture SpecimensD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD6752/D6752M Test Method for Bulk Specific Gravity andDensity of Compacted Asphalt Mixtures Using AutomaticVacuum Sealing MethodD6926 Practice for Preparation of Asphalt Mixture Speci-mens Using Marshall ApparatusE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology D8.4.Significance and Use4.1 Marshall stability and flow values along with density,airvoids in the total mix,voids in the mineral aggregate,or voidsfilled with asphalt binder,or both,filled with asphalt binder areused for laboratory mix design and evaluation of asphaltmixtures.In addition,Marshall stability and flow can be usedto monitor the plant process of producing asphalt mixture.Marshall stability and flow may also be used to relativelyevaluate different mixes and the effects of conditioning such aswith water.4.1.1 Marshall stability and flow are asphalt mixture char-acteristics determined from tests of compacted specimens of aspecified geometry.The Marshall Test can be conducted withtwo different types of equipment:(1)Method Ausing aloading frame with a load ring and a dial gauge for deformationor flow meter(Traditional Method);or(2)Method Busing aload-deformation recorder in conjunction with a load cell andlinear variable differential transducer(LVDT)or other auto-matic recording device(Automated Method).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 Nov.1,2022.Published November 2022.Originallyapproved in 2004.Last previous edition approved in 2015 as D6927 15.DOI:10.1520/D6927-22.2For 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.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.14.1.2 Typically,Marshall stability is the