ASTM_D_6934_-_08_2016.pdf

Designation:D693408(Reapproved 2016)Standard Test Method forResidue by Evaporation of Emulsified Asphalt1This standard is issued under the fixed designation D6934;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 covers the quantitative determinationof residue in emulsified asphalts composed principally of asemisolid or liquid asphaltic base,water,and an emulsifyingagent.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D6997 Test Method for Distillation of Emulsified AsphaltE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Significance and Use3.1 The test may be used to indicate compositional charac-teristics of emulsified asphalt.Evaporation residue may also besubjected to other characterization tests.3.2 This test method for residue by evaporation tends togive an asphaltic residue lower in penetration and ductility thanthe distillation test method(D6997).Material may be acceptedbut shall not be rejected as failing to meet specificationscontaining requirements for determination of residue bydistillation,on data obtained by evaporation.If residue fromevaporation fails to meet the requirements for propertiesspecified for residue from distillation,tests shall be rerun usingthe distillation test method.4.Summary of Method4.1 A sample of emulsified asphalt in an open top beaker isheated in an oven at 163 6 3C to determine the percentage ofasphalt residue.The residue from the evaporation may betested as required.5.Sample Conditioning for Testing5.1 All emulsified asphalts shall be properly stirred toachieve homogeneity before testing.5.2 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.5.3 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 5.2 if necessary.In theevent the 5.2 method is used,the sample should be cooled to 25 6 3Cbefore testing.6.Apparatus6.1 Beakerslow form,1000-mL capacity,made of glass ormetal.6.2 Glass Rodswith flame-polished ends,approximately 6mm in diameter and approximately 180 mm in length.6.3 Balancecapable of weighing 500 g to within 0.1 g.6.4 OvenCapable of maintaining a temperature of 163 63C.6.5 SieveA 76.2-mm diameter 300-m sieve conformingto Specification E11.7.Procedure A7.1 Use Procedure A when determination of the percentageof residue only is required.7.2 Determine the weight of each of three beakers contain-ing a glass rod to 0.1 g.Weigh 50 6 0.1 g of thoroughly mixed,emulsified asphalt into each of three beakers.7.3 Place the beakers containing the rods and sample in theoven,which has been adjusted to 163 6 3.0C,for 2 h.At the1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and are the direct responsibility of Subcommittee D04.42 onEmulsified Asphalt Test.Current edition approved May 1,2016.Published May 2016.Originallyapproved in 2004.Last previous edition approved in 2008 as D6934 08.DOI:10.1520/D6934-08R16.2For 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 States1 end of this period remove each beaker and stir the residuethoroughly.Replace in the oven for 1 h,then remove thebeakers from the oven,allow to cool to room temperature,andweigh with the rods.NOTE2Exercise care to prevent loss of asphalt from the beakerthrough foaming or spattering,or both.It is permissible for the technicianto observe the beakers periodically and prevent boilover by stirring thesample.The placing of beakers and emulsified asphalt samples in a coldor warm oven and bringing the oven and sample up to a temperature of163C together is also permissible.NOTE3If preferred,preliminary evaporation of water may beaccomplished by careful heating on a hot plate,followed by oventreatment