ASTM_D_6999_-_12.pdf

Designation:D699912Standard 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.It isnot applicable to the rapid-setting types.1.2 This practice 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 limitations prior to use.2.Sample Conditioning for Testing2.1 All emulsified asphalts shall be properly stirred toachieve homogeneity.2.2 All emulsified asphalts with viscosity testing require-ments of 50C shall be heated to 50 6 3C in the originalsample container in a water bath or oven.The container shouldbe vented to relieve pressure.After the sample reaches 50 63C,stir the sample to achieve homogeneity.2.3 Emulsified asphalts with viscosity testing requirementsof 25C should be mixed or stirred at 25 6 3C in the originalsample container to achieve homogeneity.NOTE1Emulsified asphalts with viscosity testing requirements of25C may be heated and stirred as specified in 2.2,if necessary.In theevent the 2.2 method is used,the sample should be cooled to 25 6 3C.3.Significance and Use3.1 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.4.Apparatus and Materials4.1 Beakerglass,400 mL capacity4.2 Graduated cylinder100 mL capacity,or other suitablecontainer to approximate 50 ml4.3 Graduated cylinder200 mL capacity4.4 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.4.5 ThermometerA thermometric device capable of mea-suring the temperatures of 25C and 50C to a tolerance of 63C5.Procedure5.1 Place approximately 50 mL of the 25 6 3C emulsifiedasphalt into a 400-mL glass beaker.5.2 Gradually add 150 mL of 25 6 3C water,with constantstirring.Allow the mixture to stand for 2 h;then examine it forany appreciable coagulation of the asphalt.6.Report6.1 Report any appreciable amount of coagulation and/orseparation of the asphalt and water as non-miscible.6.2 If there is not any appreciable amount of coagulationand/or separation then report as miscible.6.3 Report type of water used in the procedure.7.Keywords7.1 asphalt;asphalt emulsion;cationic emulsified asphalt;emulsified asphalt;miscibility1This 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.1,2012.Published August 2004.Last previousversion published as D699904.DOI:10.1520/D6999-12.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).Per