ASTM_D_6999_-_19.pdf

Designation:D699919Standard Practice forMiscibility of Emulsified Asphalts1This standard is issued under the fixed designation D6999;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 practice covers the suitability of all medium andslow-setting emulsified asphalts to be diluted with water.Ifdesired,other liquids may be substituted for water,such aspropylene glycol.It is not applicable to the rapid-setting types.1.2 UnitsThe values stated in SI units are to be regardedas standard.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 figures)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:2D8055 Guide for Selecting an Appropriate Electronic Ther-mometer for Replacing Mercury Thermometers in D04Road and Paving Standards3.Sample Conditioning for Testing3.1 All emulsified asphalts shall be properly stirred toachieve homogeneity.3.2 All emulsified 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.3.3 Emulsified asphalts with viscosity testing requirementsof 25 C should be mixed or stirred at 25 6 3 C in the originalsample container to achieve homogeneity.NOTE1Emulsified asphalts with viscosity testing requirements of25 C may be heated and stirred as specified in 3.2,if necessary.In theevent the 3.2 method is used,the sample should be cooled to 25 6 3 C.4.Significance and Use4.1 It is sometimes desirable to dilute an emulsified asphaltin the field with water.This practice is designed to ascertain ifthis may be done without irreversibly separating the water andasphalt(breaking)in the emulsified asphalt.NOTE2Water supplies available in some areas contain high levels ofdissolved salts and other minerals which coalesce(break)emulsifiedasphalts to a greater degree than distilled or deionized water.It isrecommended that the user evaluate potential local job site water sourcessuch as tap water using this practice before attempting a field dilution.5.Apparatus and Materials5.1 BeakerGlass,400-mL capacity.5.2 Graduated cylinder100-mL capacity,or other suitablecontainer to approximate 50 mL.5.3 Graduated cylinder200-mL capacity.5.4 Representative sample of water to be used at the job siteor,if not readily available,then distilled or deionized or tapwater may be used.See Note 2 for guidance.5.5 ThermometerA thermometer as described in GuideD8055 and capable of measuring the temperatures of 25 C and50 C to a tolerance of 63 C.A PRT-100(DIN/IEC class A,three or four-wire)thermometer is suitable for this purpose.6.Procedure6.1 Place approximately 50 mL of the 25 6 3 C emulsifiedasphalt into a 400-mL glass beaker.6.2 Gradually add 150 mL of 25 6 3 C water,withconstant stirring.Allow the mixture to stand for 2 h;thenexamine it for any appreciable coagulation of the asphalt.1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.42 onEmulsified Asphalt Test.Current edition approved Dec.1,2019.Published December 2019.Originallyapproved in 2004.Last previous edition approved in 2012 as D6999 12.DOI:10.1520/D6999-19.2For 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.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 7.Report7.1 Report any