1、Designation:D749721Standard Practice forRecovering Residue from Emulsified Asphalt Using Low-Temperature Evaporative Technique1This standard is issued under the fixed designation D7497;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,
2、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 practice covers a method for recovering the residuefrom emulsified asphalts such as those specified in Spe
3、cifica-tions D977 and D2397/D2397M using a low-temperatureevaporative technique that is similar to pavement conditions.The recovered residue can be used for further testing asrequired.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informat
4、iononly.1.3 The text of this standard references 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
5、,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
6、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 f
7、or Emulsified AsphaltD2397/D2397M Specification for Cationic Emulsified As-phaltD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD6934 Test Method for Residue by Evaporation of Emulsi-fied AsphaltD6997 Test Method for Distillation of Emulsifi
8、ed Asphalt2.2 Other Standard:NF EN 13074 Recovery of Binder from Bitumen Emulsionsby Evaporation33.Significance and Use3.1 The procedure described in this practice is used toobtain a residue from an emulsified asphalt that may be usedfor further testing in devices such as a dynamic shear rheom-eter.
9、The lower evaporative temperatures of this procedureprovide conditions that are very close to those of applicationtechniques for these materials.This practice could be used inplace of recovery techniques such as those of Test MethodsD6934 and D6997,when the temperatures used in thosestandards would
10、negatively affect the residue.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 generallycon
11、sidered 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 si
12、milar acceptable guideline provides ameans of evaluating and controlling some of those factors.4.Reagents and Materials4.1 Silicone MatThe mat used can be similar to thatspecified in NF EN 13074 or any mat that will allow anemulsified asphalt spread rate of 1.5 to 2.0 kg/m2.The mat mayhave a lip to
13、contain the emulsified asphalt to the appropriatearea.NOTE2A silicone mat can be purchased at various restaurant supplystores and a good size for this application is a half-sheet pan size to fit inmost laboratory ovens.1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving
14、Materials and is the direct responsibility of Subcommittee D04.42 onEmulsified Asphalt Test.Current edition approved May 1,2021.Published May 2021.Originallyapproved in 2009.Last previous edition approved in 2016 as D7497 09(2016).DOI:10.1520/D7497-21.2For referenced ASTM standards,visit the ASTM we
15、bsite,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.3Available from AFNOR(French Standard Institute),11,rue Francis dePressens 93571 La Plaine Saint-Denis Cedex,Franc
16、e,http:/www.afnor.org.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.14.2 SpatulaPalette knife or other suitable material for
