ASTM_D_6997_-_12_2020.pdf

Designation:D699712(Reapproved 2020)Standard Test Method forDistillation of Emulsified Asphalt1This standard is issued under the fixed designation D6997;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 quantitative determinationof residue and oil distillate in emulsified asphalts composedprincipally of a semisolid or liquid asphaltic base,water,andan emulsifying agent.1.2 The values stated in SI units are to be regarded as thestandard.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:2D7403 Test Method for Determination of Residue of Emul-sified Asphalt by Low Temperature Vacuum DistillationD7497 Practice for Recovering Residue from EmulsifiedAsphalt Using Low Temperature Evaporative TechniqueE1 Specification for ASTM Liquid-in-Glass ThermometersE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Summary of Method3.1 A sample of emulsified asphalt is heated in analuminum-alloy still to 260 6 5 C and the volumes ofdistillate and water obtained are measured.The residue fromthe distillation,and also any oil portion of the distillate,may betested as required.4.Significance and Use4.1 This test method can be used for quantitative determi-nation of residue and oil distillates in emulsified asphalts forspecification acceptance,service evaluation,control,and re-search.This test method can also be used to obtain residue andoil distillate for further testing.This method may not beappropriate for emulsified asphalts containing latex or poly-mer;however,some specifying agencies may utilize thismethod and stipulate a lowered distillation temperature.Bystipulating a lowered distillation temperature,the precision andbias statement may not be considered valid.Low-temperaturemethods such as Test Method D7403 and Practice D7497 areoptions for obtaining residue for latex or polymer modifiedemulsified asphalts.5.Apparatus5.1 Aluminum-Alloy StillApproximately 241 mm inheight by 95 mm inside diameter with cover and clamp asshown in Fig.1.The dimensions as noted in Fig.1 are providedas reference for the ease of the user and are considerednoncritical dimensions.NOTE1Residue by distillation results obtained with iron stills areacceptable.5.2 GasketA variety of gasket materials may be used toseal the still providing they withstand the maximum tempera-ture reached during distillation.NOTE2Use of a gasket is optional if the joint can be ground to a tightfit or only residue recovery is required and further analysis on the wateror oil distillate is not needed.5.3 Heat SourcesHaving holes on the inner periphery andhaving three spacers,to ensure centering of burner around thestill(see Fig.2).The dimensions as noted in Fig.2 are providedfor reference for the ease of the user and are considerednoncritical dimensions.NOTE3Optional use of a bunsen burner(equipped with optional wingtip)as shown in Fig.3.5.4 Connection ApparatusConsisting of approximately12 mm glass or metal connecting tube,tin shield(as detailed inFig.3),and a water-cooled glass condenser tube with a metal1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.42 onEmulsified Asphalt Test.Current edition approved Oct.15,2020.Published October 2020.Originallyapproved in 2004.Last previous edition approved in 2012 as D6997 12.DOI:10.1520/D6997-12R20.2For 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.or borosilicate glass jacket.The metal connecting tub