1、Designation:D630710Standard Test Method forAsphalt Content of Hot-Mix Asphalt 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 nu
2、mber 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 hot-mix asphalt(HMA)paving mixtures and pave-ment samples by removing the asph
3、alt cement in an ignitionfurnace.The means of sample heating may be the convectionmethod or direct irradiation 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 regarde
4、d 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
5、applica-bility of regulatory limitation prior to use.2.Referenced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC702 Practice for Reducing Samples ofAggregate to TestingSizeD75 Practice for Sampling AggregatesD140 Pra
6、ctice for Sampling Bituminous MaterialsD979 Practice for Sampling Bituminous Paving MixturesD1461 Test Method for Moisture or Volatile Distillates inBituminous Paving MixturesD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materi
7、als TestingD5444 Test Method for Mechanical Size Analysis of Ex-tracted Aggregate3.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
8、 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 me
9、thod can be used for quantitative determi-nation of asphalt content in HMA paving mixtures and pave-ment samples 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 grada
10、tion 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 an
11、d 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 andminimum openings of 3.35 mm and 600 m,respectively,has been f
12、oundto 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.5.4 Catch Pan/Sample Tray(s)Handling Apparatus,suitablefor inserting catch pan and sample tray(s)into furnace andremoving hot
13、 catch pan and sample tray(s)from furnace.5.5 Assorted Spatulas,Pans,Bowls,and Wire Brushes,forpreparing HMAmixtures and removing aggregate from sampletray(s)and catch pan.5.6 Protective Gloves,well insulated and capable of with-standing 580C.1This test method is under the jurisdiction of ASTM Commi
14、ttee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.25 onAnalysis of Bituminous Mixtures.Current edition approved Dec.1,2010.Published March 2011.Originallyapproved in 1998.Last previous edition approved in 2005 as D6307 05.DOI:10.1520/D6307-10.2For referenced A
15、STM 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
16、 19428-2959.United States1 5.7 OvensMechanical ovens,convection or forced draft,shall be provided for drying aggregates and HMA mixtures,and for preheating HMA mixtures prior to ignition testing.5.8 Ignition Furnace,as described in 8.1.1 or 11.1.1.6.Hazards6.1 The temperature of the furnace,sample,sample tray(s),and catch pan after removal from the furnace is extremely high.Caution,therefore,must be exercised at all times whenhandling these items as failure to do so could result in seriousinjury