ASTM_D_5404_-_D_5404M_-_12.pdf

Designation:D5404/D5404M12Standard Practice forRecovery of Asphalt from Solution Using the RotaryEvaporator1This standard is issued under the fixed designation D5404/D5404M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice is intended to recover asphalt from asolvent using the rotary evaporator to ensure that changes inthe asphalt properties during the recovery process are mini-mized.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.2.1 Residual pressure measurements are shown in both theSI unit of kPa and the commonly used non-standard equivalentunit of“mm of Hg”.1.2.2 Measurements of volume and mass are only given inSI units because they are the only units typically used inpractice when performing this standard practice.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 applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD1856 Test Method for Recovery of Asphalt From Solutionby Abson MethodD2939 Test Methods for Emulsified Bitumens Used asProtective Coatings(Withdrawn 2012)3D3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD6368 Specification for Vapor-Degreasing Solvents Basedon normal-Propyl Bromide and Technical Grade normal-Propyl Bromide3.Summary of Practice3.1 The solution of solvent and asphalt from a prior extrac-tion is distilled by partially immersing the rotating distillationflask of the rotary evaporator in a heated oil bath while thesolution is subjected to a partial vacuum and a flow of nitrogengas or carbon dioxide gas.The recovered asphalt can then besubjected to testing as required.4.Significance and Use4.1 In order to determine the characteristics of the asphalt inan asphalt paving mixture,it is necessary to extract the asphaltfrom the aggregate by means of a suitable solvent and then torecover the asphalt from the solvent without significantlychanging the asphalts properties.The asphalt recovered fromthe solvent by this practice can be tested using the samemethods as for the original asphalt cement,and comparisonsbetween the properties of the original and recovered asphaltcan be made.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 Standard Practice D3666 are generallyconsidered capable of competent and objective testing/sampling/inspection/etc.Users of this standard are cautioned that compliance withPractice D3666 alone does not completely assure reliable results.Reliableresults depend on many factors;following the suggestions of PracticeD3666 or some similar acceptable guideline provides a means ofevaluating and controlling some of those factors.5.Apparatus5.1 Rotary Evaporator(see Fig.1),equipped with a distil-lation flask,a variable speed motor capable of rotating thedistillation flask at a rate of at least 50 rpm,condenser,solvent1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.25 onAnalysis of Bituminous Mixtures.Current edition approved June 1,2012.Published May 2013.Originallyapproved in 1997.Last previous edition approved in 2011 as D5404/D5404M 11.DOI:10.1520/D5404_D5404M-12.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 recovery flask,and heated oil bath.The angle of the distillationflask from the horizontal to the bath is set at approximately 15.The distillation flask(Note 2),when fully immersed,should beat a depth of approximately 40 mm 1.5 in.NOTE2A flask having a 2000 mL capacity is recommended.5.1.1 Thermometric DeviceA built-in temperature mea-surement device capable of displaying the oil temperatures tothe nearest 1C 2F.5.2 Manometer or Vacuum Gage,suitable for