ASTM_D_5546_-_09.pdf

Designation:D554609Standard Test Method forSolubility of Asphalt Binders in Toluene by Centrifuge1This standard is issued under the fixed designation D5546;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 determination of the degree ofsolubility of asphalt binders in toluene using centrifugalseparation.The method is an alternative to Test Method D2042,and may be preferable to Test Method D2042 when testingmodified asphalt binders.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 A complete precision statement for this standard has notbeen developed at this time.Therefore,this standard should notbe used for acceptance or rejection of a material for purchasingpurposes.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D36 Test Method for Softening Point of Bitumen(Ring-and-Ball Apparatus)D2042 Test Method for Solubility of Asphalt Materials inTrichloroethyleneD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD4007 Test Method for Water and Sediment in Crude Oil bythe Centrifuge Method(Laboratory Procedure)3.Summary of Test Method3.1 The sample is dissolved in toluene and centrifuged toseparate the insoluble material.The insoluble material is driedand weighed.4.Significance and Use4.1 This test method is a measure of the solubility ofpolymer-modified asphalt in toluene.The portion that issoluble in toluene represents the active cementing constituents.Additional tests to characterize the insoluble residue may beconducted.Such tests might include infrared spectroscopy,microscopy,ash content,and so forth.NOTE1The 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 assure 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 these factors.5.Apparatus and Materials5.1 Centrifuge:5.1.1 A centrifuge with a swinging bucket rotor capable ofspinning two or more filled centrifuge tubes shall be used.Thecentrifuge shall be capable of delivering a minimum relativecentrifugal force(RCF)of 700 at the tip of the tubes,andmaintaining this RCF for a minimum of 10 min.5.1.2 The revolving head,trunnion rings,and trunnion cups,including the cushions,shall be constructed soundly to with-stand the maximum centrifugal force capable of being deliv-ered by the power source.The trunnion cups and cushions shallsupport the tubes firmly when the centrifuge is in motion.Thecentrifuge shall be enclosed by a metal chamber strong enoughto eliminate danger if any breakage occurs.The centrifugechamber shall be isolated from potential ignition sources.5.2 Centrifuge TubesFor referee testing,each centrifugetube shall be a 100-mL cone-shaped tube conforming to thedimensions given in Fig.1.For routine quality assurancetesting,alternate centrifuge tubes may be used.Alternatecentrifuge tubes shall have a cone shaped bottom,a lengthbetween 150-210 mm,and a nominal capacity of 100 mL.All1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.47 onMiscellaneous Asphalt Tests.Current edition approved June 1,2009.Published June 2009.Originallyapproved in 1994.Last previous edition approved in 2001 as D5546 01.DOI:10.1520/D5546-09.2For 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 States1 centrifuge tubes shall be made of thoroughly annealed glassand shall be marked at the 100-mL level.N