1、Designation: D 6930 04Standard Test Method forSettlement and Storage Stability of Emulsified Asphalts1This standard is issued under the fixed designation D 6930; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revi
2、sion. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method covers the ability of an emu
3、lsifiedasphalt 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 This test method does not purport to address all of thesafety concerns, if any, associated with its
4、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:2D 6934 Test Method for Residue by Evaporation of Emul-sified Asphalt3. Si
5、gnificance 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 othe
6、r 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 differencebe
7、tween 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
8、 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 origi
9、nalsample container to achieve homogeneity.NOTE 1Emulsified 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 cy
10、linder, with pressed ormolded glass base and cork, rubber, or glass stopper, having anoutside diameter of 50 6 5 mm.NOTE 2The 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 sipho
11、n glass-tube pipet of op-tional 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 tem
12、perature, 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 e
13、mulsified asphaltfrom the top of the cylinder by means of the pipet or siphon1This 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 Tests.Current edition approved Aug. 1, 2004. Publish
14、ed August 2004.2For 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.1Copyright ASTM International, 100 Barr Harbor
15、 Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.without disturbing the remainder of the sample. Thoroughlystir the 55-mL portion.NOTE 3If 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
16、arm.7.2 Weigh 50.0 6 0.1 g of the sample into a weighed1000-mL glass or metal beaker that has been previouslyweighed with 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. Weig
17、h 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 and sample in the ovenfor 2 h. At the end of this period, remove each beaker andthoroughly stir the residue. Replace in the
18、 oven for 1 h, thenremove the beakers from the oven, allow to cool to ambienttemperature, and weigh, with the rods (see Test MethodD 6934).NOTE 4Excercise care to prevent loss of asphalt from the beakerthrough foaming or splattering, or both. Also, the placing of beakers andemulsified asphalt sample
19、s in a cold or warm oven, and bringing the ovenand sample up to a temperature of 163C together is permissible. Ifpreferred, preliminary evaporation of water may be accomplished bycareful heating on a hot plate, followed by oven treatment at 163C for 1h.8. Calculation emulsified asphalt; asphalt emul
20、sion; cationicemulsified asphalt; storage stability; settlementASTM 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
21、 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
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23、air 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).D6930042
