ASTM_D_6997_-_12.pdf

Designation:D699712Standard 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 test method 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:2E1 Specification for ASTM Liquid-in-Glass ThermometersE11 Specification for Woven Wire Test Sieve Cloth and TestSievesD7403 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 Technique3.Summary of Method3.1 A sample of emulsified asphalt is heated in analuminum-alloy still to 260 6 5C and the volumes of distillateand water obtained are measured.The residue from thedistillation,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 polymer,however some specifying agencies may utilize this method andstipulate a lowered distillation temperature.By stipulating alowered distillation temperature,the precision and bias state-ment may not be considered valid.Low temperature methodssuch as Test Method D7403 and Practice D7497 are options forobtaining residue for latex or polymer modified emulsifiedasphalts.5.Apparatus5.1 Aluminum-Alloy Stillapproximately 241 mm in heightby 95 mm inside diameter with cover and clamp as shown inFig.1.The dimensions as noted in Fig.1 are provided asreference for the ease of the user and are considered noncriticaldimensions.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 considerednon-critical dimensions.NOTE3Optional use of a Bunsen burner(equipped with optional wingtip)as shown in Fig.3.5.4 Connection Apparatusconsisting of approximately 12mm glass or metal connecting tube,tin shield(as detailed inFig.3),and a water-cooled glass condenser tube with a metalor borosilicate glass jacket.The metal connecting tube may besecured to the lid by a threaded compressing fitting.Glassconnecting tube may be secured to the lid by means of a corkor silicone stopper.Other condensers of approximately 12 mmglass or metal tubing may be used,providing that the wettedlength is 400 to 550 mm.The dimensions as noted in Fig.3 are1This 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 Feb.1,2012.Published February 2012.Last previousversion published 2004 as D699704.DOI:10.1520/D6997-12.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 provided for reference for the ease of the user and areconsidered non-critical dimensions.5.5 Graduated Cylinder100-mL,with graduation inter-vals of 1.0 mL.5.6 ThermometerASTM 7C thermometer,as prescribed inSpecification E1,or any other thermometric device of equalaccuracy.5.7 Balancecapable of weighing 3500 g to within 60.1 g.5.8 StoppersCork(wrapped in foil)or silicone stoppers toseal