Designation: D6936 − 17Standard Test Method forDetermining Demulsibility of Emulsif i ed Asphalt 1This standard is issued under the f i xed designation D6936; 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, applicable to both anionic and cationicemulsif i ed asphalts of the RS and MS type, measures thechemical breaking of the emulsif i ed asphalt.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes(excluding those in tables and f i gures) 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: 2D511 Test Methods for Calcium and Magnesium In WaterD3666 Specif i cation for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD6934 Test Method for Residue by Evaporation of Emulsi-f i ed AsphaltD6997 Test Method for Distillation of Emulsif i ed AsphaltE11 Specif i cation for Woven Wire Test Sieve Cloth and TestSieves3. Signif i cance and Use3.1 This test method is used to identify or classify anemulsif i ed asphalt as an RS or MS by measuring the amount ofavailable asphalt that is broken from the emulsif i ed asphalt byutilizing specif i ed amounts and concentrations of calciumchloride solution for anionic emulsif i ed asphalts and dioctylsodium sulfosuccinate for cationic emulsif i ed asphalts.N OTE 1—The 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 Specif i cation D3666 are generallyconsidered capable of competent and objective testing, sampling,inspection, etc. Users of this standard are cautioned that compliance withSpecif i cation D3666 alone does not completely ensure reliable results.Reliable results depend on many factors; following the suggestions ofSpecif i cation D3666 or some similar acceptable guideline provides ameans of evaluating and controlling some of those factors.4. Sample Conditioning for Testing4.1 All emulsif i ed asphalts shall be properly stirred toachieve homogeneity before testing.4.1.1 All emulsif i ed asphalts with viscosity testing require-ments of 50 °C shall be heated to 50 6 3 °C in the originalsample container in a water bath or oven. The container shouldbe vented to relieve pressure. After the sample reaches 50 63 °C, stir the sample to achieve homogeneity.4.1.2 Emulsif i ed asphalts with viscosity testing require-ments of 25 °C should be mixed or stirred at 25 6 1 °C in theoriginal sample container to achieve homogeneity.N OTE 2—Emulsif i ed asphalts with viscosity testing requirements of25 °C may be heated and stirred as specif i ed in 4.1.1, if necessary. In theevent the 4.1.1 method is used, the sample should be cooled to 25 6 1 °Cbefore testing.5. Apparatus and Reagents5.1 Wire Cloth—1.40-mm wire cloth that is at least 125 mmsquare, unframed, and having wire diameters and openings thatconform to Specif i cation E11.5.2 Beaker—Metal beaker or other suitable metal containerwith a minimum 300-mL capacity.5.3 Stirring Rod—Metal rod with rounded ends, approxi-mately 10 mm in diameter.5.4 Buret—50-mLglass buret graduated in 0.1-mLintervals.1 This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.42 onEmulsif i ed Asphalt Test.Current edition approved Sept. 1, 2017. Published September 2017. Originallyapproved in 2004. Last previous edition approved in 2009 as D6936 – 09. DOI:10.1520/D6936-17.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service@astm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s 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 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 Copyright by ASTM Int'l (all rights reserved); Fri Oct 6 23:43:33 EDT 2017Downloaded/printed byUniversity of Edinburgh (University of Edinburgh) pursuant to License Agreement. No further reproductions authorized.
