ASTM_D_7404_-_19.pdf

Designation:D740419Standard Test Method forDetermination of Emulsified Asphalt Residue by MoistureBalance Analyzer1This standard is issued under the fixed designation D7404;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 a rapid and quantitative deter-mination of the residue in emulsified asphalts using a moisturebalance analyzer.It is applicable to all nonsolvent-containingemulsion types.1.2 The values stated in SI units are to be regarded as thestandard.1.3 A precision and bias statement for this test method hasnot been completed at this time.Therefore,this test methodshould not be used for acceptance or rejection of a material forpurchasing purposes.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:2D977 Specification for Emulsified AsphaltD2397/D2397M Specification for Cationic Emulsified As-phaltD6934 Test Method for Residue by Evaporation of Emulsi-fied AsphaltD6997 Test Method for Distillation of Emulsified Asphalt3.Summary of Test Method3.1 A sample of emulsified asphalt is placed in an opensample tray with an appropriate liquid transfer device capableof handling 1-to 3-mL sample sizes.The sample is heated toa preset temperature as required by emulsion type but neverexceeding 163 C to determine the percentage of asphaltresidue.4.Significance and Use4.1 This test is used to indicate the compositional charac-teristics of emulsified asphalt and is applicable to anionicemulsified asphalts as described in Table 1 of SpecificationD977 and cationic emulsified asphalt as described in Table 1 ofSpecification D2397/D2397M except solvent-containing emul-sions.The residue obtained from this test method may also besubjected to rheological characterizations.5.Apparatus5.1 Glass Rods,with flame-polished ends used for stirringthe emulsion as described in Test Method D6934.5.2 Moisture Balance Analyzer,equipped with a heatingelement and capable of running either isothermally or in aprogrammable temperature-gradient mode.36.Sample Conditioning for Testing6.1 All emulsified asphalts shall be properly stirred toachieve homogeneity before testing as described in TestMethod D6934.6.2 Aminimum of 1 g and up to 3 g is used to determine theemulsified asphalt residue.7.Calibration and Standardization7.1 Follow the manufacturers guidelines for calibration andstandardization.8.Procedure8.1 Polymer-Modified Emulsified Asphalts:1This 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 Nov.1,2019.Published November 2019.Originallyapproved in 2007.Last previous edition approved in 2016 as D7404 07(2016).DOI:10.1520/D7404-19.2For 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.3The moisture balance analyzer is available commercially from differentmanufacturers.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.1 8.1.1 Program the moisture analyzer for an isothermal runset for an end temperature of 100 C with a switch-off criterionof 1 mg for 140 s or higher times for the highest accuracy.Forlower accuracy,set the instrument at 1 mg for 50 s or lowertimes for a faster run.The automatic switch-off criterion is usedto set the instruments sensitivity for higher accuracy(1 mg for140 s or longer times)or for lower accuracy(1 mg for 50 s orlower times).8.1.2 Monitor the residue continuously and print a record atthe end of the run if a documented report is required.8.2 Nonpolymer Emulsified Asphalts and Temperature-Gradient RunProgram the moisture analyzer for an isother-mal run set for a