1、Designation:D4887/D4887M11(Reapproved 2021)1Standard Practice forPreparation of Viscosity Blends for Hot Recycled AsphaltMaterials1This standard is issued under the fixed designation D4887/D4887M;the number immediately following the designation indicates theyear of original adoption or,in the case o
2、f revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTESection 1 was updated editorially in December 2021.1.Scope1.1 This practice covers the procedure for prepa
3、ration of hotrecycled bituminous blends for testing in the laboratory.Theprocedure involves an iterative trial blend process followed bythe preparation of batch blends.1.2 The batch blends can be used for extensive evaluationsuch as viscosity,penetration,ductility,aging properties(suchas Rolling Thi
4、n Film Oven or Thin-Film Oven tests,or both(RTFO/TFO),composition analysis,solubility analysis,andother user-selected tests.1.3 This practice assumes that a representative reclaimedasphalt pavement(RAP)sample is extracted and the agedbinder recovered using Test Methods D2172/D2172M and TestMethod D1
5、856(this practice may be modified by using a rotaryevaporator which is extensively evaluated in the minutes of the18th Pacific Coast Conference on Asphalt Specifications2)orany other acceptable test method.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as s
6、tandard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in nonconformancewith the standard.1.5 The text of this standard references notes and footnoteswhich provide explanatory
7、material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.1.6 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 app
8、ro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDev
9、elopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D1856 Test Method for Recovery of Asphalt from Solutionby Abson MethodD2171/D2171M Test Method for Viscosity of As
10、phalts byVacuum Capillary ViscometerD2172/D2172M Test Methods for Quantitative Extraction ofAsphalt Binder from Asphalt MixturesD3381/D3381M Specification for Viscosity-Graded AsphaltBinder for Use in Pavement ConstructionD6373 Specification for Performance-Graded AsphaltBinderD6816 Practice for Det
11、ermining Low-Temperature Perfor-mance Grade(PG)of Asphalt Binders(Withdrawn 2021)4D7175 Test Method for Determining the Rheological Prop-erties of Asphalt Binder Using a Dynamic Shear Rheom-eter3.Summary of Practice3.1 This specification covers the use of a viscosity blendingchart shown in Fig.1 or
12、by a Performance Grade(PG)temperature blending chart shown in Fig.2 to determine thepercentage of a recycling agent,rejuvenating agent,or paving-grade asphalt(hereafter referred to as virgin modifier)requiredto meet the target viscosity or PG temperature.The blending1This practice is under the juris
13、diction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.25 onAnalysis of Asphalt Mixtures.Current edition approved Dec.15,2021.Published December 2021.Originallyapproved in 1989.Last previous edition approved in 2016 as D4887/D4887M 11(2016).DOI
14、:10.1520/D4887_D4887M-11R21E01.2Asphalt Recovery Subcommittee Report,San Francisco,CA,May 1718,1983.3For 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 Documen
15、t Summary page onthe ASTM website.4The last approved version of this historical standard is referenced onwww.astm.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 international
16、ly 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?NOTE1Calculations using ordinate viscosity()values(scalesAand B)can be simplified by using loglog(100 Aor B(Pas)such that ordinatesand abscisca axes become linear.FIG.1 Percent RAM Binder Allowed Based on ViscosityD4887/D4887M 11(2021)12?chart based on visco
