ASTM_D_6307_-_19.pdf

Designation:D630719Standard Test Method forAsphalt Content of Asphalt Mixture by Ignition Method1This standard is issued under the fixed designation D6307;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 asphaltcontent of asphalt mixture and asphalt pavement samples byremoving the asphalt cement in an ignition furnace.The meansof sample heating may be the convection method or directirradiation method.NOTE1Aggregate obtained by this test method may be used for sieveanalysis.Particle size degradation may occur with some aggregates.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,health,and environmental practices and deter-mine the applicability 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:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD75/D75M Practice for Sampling AggregatesD140/D140M Practice for Sampling Asphalt MaterialsD979/D979M Practice for Sampling Bituminous PavingMixturesD1461 Test Method for Moisture or Volatile Distillates inAsphalt MixturesD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD5444 Test Method for Mechanical Size Analysis of Ex-tracted Aggregate2.2 AASHTO Standard:3R47 Standard Practice for Reducing Samples of Hot MixAsphalt(HMA)to Testing Size3.Summary of Test Methods3.1 The asphalt cement in the paving mixture is ignitedusing the furnace equipment applicable to the particularmethod.The asphalt content is calculated by difference fromthe mass of the residual aggregate and moisture content.Theasphalt content is expressed as mass percent of moisture-freemixtures.Test Method A is intended for furnaces with aninternal automated weighing system.Test Method B is in-tended for furnaces without an internal weighing system.4.Significance and Use4.1 This test method can be used for quantitative determi-nation of asphalt content in asphalt mixture and pavementsamples for quality control,specification acceptance,andmixture evaluation studies.This test method does not requirethe use of solvents.Aggregate obtained by this test methodmay be used for gradation analysis according to Test MethodD5444.5.Apparatus5.1 Balance,readable to 0.1 g,and capable of measuring themass of sample,sample trays,and catch pan.The balance shallbe in accordance with Guide D4753,Class GP2.5.2 Sample Tray(s),of appropriate size that allows thesamples to be spread thinly and allows air to flow up throughand around the sample particles.The sample shall be enclosedcompletely with screen mesh,perforated stainless steel plate,or other suitable material.NOTE2Screen mesh or other suitable material with maximum and1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.25 onAnalysis of Asphalt Mixtures.Current edition approved Jan.1,2019.Published February 2019.Originallyapproved in 1998.Last previous edition approved in 2016 as D6307 16.DOI:10.1520/D6307-19.2For 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 for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 minimum openings of 3.35 mm and 600 m,respectively,has been foundto perform well.5.3 Catch Pan,of appropriate size to hold the sample traysso that aggregate particles and melting asphalt binder fallingthrough the screen mesh are caught