ASTM_D_7403_-_19.pdf

Designation:D740319Standard Test Method forDetermination of Residue of Emulsified Asphalt by LowTemperature Vacuum Distillation1This standard is issued under the fixed designation D7403;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 method covers the quantitative determination ofresidue in emulsified asphalts composed principally of asemisolid or liquid asphaltic base,water,and an emulsifyingagent.The emulsified asphalts will generally contain polymericmaterials.It is especially suitable for emulsified asphalt residueproperties that may be altered at the high-temperature 260 C(500 F)distillation.Since there is currently not a precisionstatement for this procedure,it is recommended to the user thatthis procedure not be used for buy/sell purposes at the presenttime.1.2 UnitsThe values stated in SI units are to be regardedas standard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.3 The text of this standard reference 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 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.1.5 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:2D3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD6997 Test Method for Distillation of Emulsified Asphalt3.Significance and Use3.1 This test method can be used for quantitative determi-nation of residue in emulsified asphalts at a temperature of135 C(275 F)with a 60-min distillation test using currentdistillation apparatus.This method is suitable to obtain resi-dues for service evaluation,quality control,and research.Thisdistillation method is not intended to produce residues equiva-lent to the Test Method D6997 260 C(500 F)distillationprocedure.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 ensure 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 those factors.4.ApparatusPROCEDURE A4.1 Aluminum Alloy Still,conforming to Test MethodD6997 except that a 13-mm(12-in.)diameter hole is drilledbetween the two existing 13-mm(12-in.)thermometer holes forthe connection of a vacuum gauge(see Fig.1).The jointbetween the still and lid shall be airtight with the gasket inplace.Other heating devices may be used,provided theyemploy the intended control of temperature during the distil-lation procedure.4.2 Connection Apparatus,Test Method D6997,with modi-fications as shown in Fig.2.Connection tubing may be ofsuitable materials provided the intended vacuum,temperature,and method are maintained.Other forms of condensers may beused,provided they have an equivalent or greater interiorsurface area for condensation of distillate.NOTE2Silicone rubber stoppers are recommended.4.3 ThermometerOne of the following:(1)ASTM 7C(7F)thermometer,or(2)thermocouple(s)calibrated at 135 C1This 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 July 15,2019.Published August 2019.Originallyapproved in 2009.Last previous edition approved in 2017 as D7403 09(2017).DOI:10.1520/D7403-19.2For 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 a