ASTM_D_6930_-_10.pdf

Designation:D693010Standard Test Method forSettlement and Storage Stability of Emulsified Asphalts1This standard is issued under the fixed designation D6930;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 ability of an emulsifiedasphalt to remain as a uniform dispersion during storage.It isapplicable to 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 test method 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:2D6934 Test Method for Residue by Evaporation of Emulsi-fied Asphalt3.Significance and Use3.1 This test method is useful for determining,in a com-paratively short time,the storage stability or settlement of anemulsified asphalt.It is a measure of the permanence of thedispersion as related to time,but it is not to be construed tohave significance as a measure of other stability aspectsinvolved in use.4.Summary of Test Method4.1 This test method determines the difference in percentresidue of samples taken from the top and bottom of materialplaced in undisturbed simulated storage for a specified timeperiod.The result is expressed by determining the differencebetween the percent residue of the top and bottom samples forthe storage cylinder.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 Cylinder500 mL glass cylinder,with pressed ormolded glass base and cork,rubber,or glass stopper,having anoutside diameter of 50 6 5 mm.NOTE2The use of a cylinder containing side arm glass tubes topermit the siphoning of the material rather than pipetting is an acceptablealternative method.6.2 Glass PipetA 50 mL siphon glass-tube pipet ofoptional form.6.3 Balance,capable of weighing 1000 g to 0.1 g.6.4 BeakersTwo 1000 mL glass or metal beakers.6.5 Stir RodsGlass or Stainless Steel with rounded ends.6.6 OvenCapable of maintaining a temperature of 163 63C.7.Procedure7.1 Bring the emulsified asphalt to room temperature,22Cto 28C.Place a 500 mL representative sample in the glasscylinder.Stopper the cylinder and allow it to stand undisturbed,at laboratory air temperature 22C to 28C,for 24 h for storagestability or 5 days for settlement test.After standing for thisperiod,remove approximately 55 mL of emulsified asphaltfrom the top of the cylinder by means of the pipet or siphonwithout disturbing the remainder of the sample.Thoroughlystir the 55 mL portion.1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.42 onEmulsified Asphalt Test.Current edition approved Dec.1,2010.Published March 2011.Originallyapproved 2004 as D693010.DOI:10.1520/D6930-10.2For 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 NOTE3If the cylinder with side arms is used,siphoning is notrequired.Obtain a 55 mL sample from the upper arm,then drain off 390mL from the lower arm.7.2 Weigh 50.0 6 0.1 g of the sample into a weighed 1000mL glass or metal beaker that has been previously weighedwith a glass rod.7.3 After removal of the top portion,siphon off the next 390mL(approximate)from the cylinder.Thoroughly stir theemulsified asphalt remaining in the cylinder.Weigh 50.0 60.1g into a previously weighed 1000 mL glass or metal beakerwith a glass rod.7.4 Adjust the temperature of the oven to 163 6 3C andplace the beakers containing the rods an