1、Designation:D740407(Reapproved 2012)Standard Test Method forDetermination of Emulsified Asphalt Residue by MoistureAnalyzer1This 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
2、 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 1.1 This test method covers a rapid and quantitativedetermination of the residue in emulsified asphalts using amoi
3、sture 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 rej
4、ection 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 and health practices and determine the applica-bility of regulatory
5、 limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D977 Specification for Emulsified AsphaltD2397 Specification for Cationic Emulsified AsphaltD6934 Test Method for Residue by Evaporation of Emulsi-fied AsphaltD6997 Test Method for Distillation of Emulsified Asphalt3.Summary of Test
6、 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 163C to determine the percentage of asphaltresidu
7、e.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 except solvent
8、-containing emulsions.Theresidue obtained from this test method may also be subjected torheological 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 ca
9、pable 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 thee
10、mulsified asphalt residue.7.Calibration and Standardization7.1 Follow the manufacturers guidelines for calibration andstandardization.8.Procedure8.1 Polymer-Modified Emulsified Asphalts8.1.1 Program the moisture analyzer for an isothermal runset for an end temperature of 100C with a switch-off crite
11、rionof 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 m
12、g for 50 s orlower times).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 June 1,2012.Published June 2012.DOI:10.1520/D7404-07R12.2For referenced A
13、STM 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 differentmanufacturer
14、s.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 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
15、 moisture analyzer for an isother-mal run set for an end temperature of 163C with a switch-offcriterion of 1 mg for 140 s or longer times for the highestaccuracy.Set the instrument at 1 mg for 50 s or shorter timesfor a faster run and a lower accuracy.Use the switch-offcriterion to set the instrumen
16、ts sensitivity as described aboveto stop the test automatically when the change in weight iswithin 1 mg for 140 s or longer times(higher accuracy)or 1 mgfor 50 s or shorter times(lower accuracy).NOTE1Although this test method is not for solvent-containingemulsions,some guidance is given for practitioners who desire to obtainresidue for emulsions of that type.Program the moisture analyzer to runin the temperature-gradient mode by setting the start temperature at 50Cand setting the ramp temperatur
