1、Designation: D 6936 09Standard Test Method forDetermining Demulsibility of Emulsified Asphalt1This standard is issued under the fixed designation D 6936; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、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, applicable to both anionic and cationicemulsified asphalts of the RS and MS type, measures thechemical breaking of th
3、e emulsified asphalt.1.2 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 prio
4、r to use.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.2. Referenced Documents2.1 ASTM Standards:2D511 Test Methods for Calcium and Magnesium In WaterD 6934 Test Method for Residue by Evaporation of Emul-sified AsphaltD 69
5、97 Test Method for Distillation of Emulsified AsphaltE11 Specification for Woven Wire Test Sieve Cloth andTest Sieves3. Significance and Use3.1 This test method is used to identify or classify anemulsified asphalt as an RS or MS by measuring the amount ofavailable asphalt that is broken from the emu
6、lsified asphalt byutilizing specified amounts and concentrations of calciumchloride solution for anionic emulsified asphalts and dioctylsodium sulfosuccinate for cationic emulsified asphalts.4. Sample Conditioning for Testing4.1 All emulsified asphalts shall be properly stirred toachieve homogeneity
7、 before testing.4.2 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.4.3 E
8、mulsified asphalts with viscosity testing requirementsof 25C should be mixed or stirred at 25 6 1C in the originalsample container to achieve homogeneity.NOTE 1Emulsified asphalts with viscosity testing requirements of25C may be heated and stirred as specified in 4.2, if necessary. In theevent the 4
9、.2 method is used, the sample should be cooled to 25 6 1Cbefore testing.5. Apparatus and Reagents5.1 Wire Cloth1.40-mm wire cloth that is at least 125 mmsquare, unframed, and having wire diameters and openings thatconform to Specification E11.5.2 Beakermetal beaker or other suitable metal containerw
10、ith a minimum 300-mL capacity.5.3 Stirring Rodmetal rod with rounded ends, approxi-mately 10 mm in diameter.5.4 Buret50-mLglass buret graduated in 0.1 mLintervals.5.5 Calcium Chloride Solution (1.11 g/L)1.11 g of cal-cium chloride (CaCl2) dissolved in distilled or deionized waterand diluted to 1 L.
11、The 1.11 g/L calcium chloride solution maybe standardized to be a 0.02 6 0.001 N solution of calciumchloride in water. Although this solution will remain stable, itshall be stored in an airtight container when not in use.5.6 Calcium Chloride Solution (5.55 g/L)5.55 g of cal-cium chloride (CaCl2) dis
12、solved in distilled or deionized waterand diluted to 1 L. The 5.55 g/L calcium chloride solution maybe standardized to be a 0.10 6 0.001 N solution of calciumchloride in water. Although this solution will remain stable, itshall be stored in an airtight container when not in use.NOTE 2Test Methods D5
13、11 is a method that could be used tostandardize the solutions in 5.5 and 5.6.5.7 Dioctyl Sodium Sulfosuccinate Solution (0.80 %)8.00g of dioctyl sodium sulfosuccinate dissolved in 992 g ofdistilled or deionized water. This solution will degrade overtime and shall be stored in a cool dark location wh
14、en not in use,in a dark glass or dark impermeable plastic air-tight container.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 June 1, 2009. Publish
15、ed July 2009. Originally approvedin 2004. Last previous edition approved in 2004 as D 6936 04.2For 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
16、 Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.It shall not be used for testing purposes if more than 90 dayshave elapsed since it was prepared.NOTE 3A test method that could be used to standardize t
17、his solutioncan be found in “The United States Pharmacopeia, The National Formu-lary” under the section on Docusate Sodium (444.56) as recommended byCytec Industries (a manufacturer of this material).5.8 Balance, capable of weighing 500 6 0.1 g.5.9 Oven, capable of maintaining a temperature of 163 6
18、3C6. Procedure6.1 Determine the percentage of residue as described in TestMethod D 6997 or Test Method D 6934.6.2 Record the weight of the assembly consisting of: themetal beaker or metal container with a 300 mL minimumcapacity, the metal stirring rod, and the wire cloth.6.3 Weigh 100 6 0.1 g of the
19、 25 6 1.0C emulsified asphaltinto the 300-mL beaker in the weighed assembly. Bring theweighed sample of emulsion and the proper reagent to atemperature of 25 6 1.0C.NOTE 4While conditioning the emulsified asphalt sample to the testtemperature, it should be kept covered to avoid the evaporation of wa
20、ter,which will affect the residue of the test sample and consequently the testresult.6.4 Over a period of approximately 2 min, add the appro-priate reagent (at room temperature) to the metal beaker ormetal container, from a buret:6.4.1 35 mL of CaCl2 0.02 N solution (1.11 g/L) (5.5) foranionic rapid
21、 setting emulsified asphalts, or6.4.2 50 mL of 0.10 N CaCl2 solution (5.55 g/L) (5.6) foranionic medium setting, or mixing-type, emulsified asphalts, or6.4.3 35 mL of dioctyl sodium sulfosuccinate solution(0.80 %) (5.7) for cationic rapid setting emulsified asphalts.6.5 While adding the solution (6.
22、4.1, 6.4.2,or6.4.3), stir thecontents of the metal beaker or container continuously andvigorously, kneading any lumps against the sides of the metalbeaker or container to ensure thorough mixing of the reagentwith the emulsified asphalt.6.6 Continue kneading any lumps for an additional 2 minafter all
23、 the solution has been added.6.7 Decant the mixture of any unbroken emulsified asphaltand reagent onto the wire cloth. Rinse the metal beaker orcontainer containing the sample and metal rod with distilledwater, pouring the rinse water through the wire cloth. Kneadand break up all lumps, and continue
24、 washing the metal beakeror container, rod, and wire cloth until the rinse water drainsclear.6.8 Place the wire cloth enclosing the asphalt residue in themetal beaker or container with the metal rod. Place theassembly in a 163 6 3C drying oven for 1 h.Allow the beakerand contents to cool and weigh.
25、Repeat the heating andweighing until successive weights differ by no more than 0.1 g.7. Calculation7.1 Subtract the tare weight of the assembly from the weightof the dried assembly to obtain the demulsibility residue.Calculate the demulsibility as follows:Demulsibility, % 5 A/B! 3 100 (1)where:A = w
26、eight of demulsibility residue from the test of thesample of emulsified asphalt, andB = weight of residue in 100 g of the emulsified asphalt.8. Precision and Bias8.1 The following criteria should be used for judging theacceptability of results of tests on RS emulsified asphalt (95 %probability):8.1.
27、1 Duplicate results by the same operator should not beconsidered suspect unless they differ by more than the follow-ing amount:Demulsibility, weight % Repeatability, % of the mean30 to 100 58.1.2 The results submitted by each of two laboratoriesshould not be considered suspect unless they differ by
28、morethan the following amount:Demulsibility, weight % Reproducibility, % of the mean30 to 100 308.2 Precision does not apply when using dioctyl sodiumsulfosuccinate solution in the testing of cationic emulsifiedasphalt for demulsibility.8.3 The bias of this test cannot be determined because nomateri
29、al having an accepted reference value is available.9. Keywords9.1 asphalt emulsion; cationic emulsified asphalt; demulsi-bility; emulsified asphalt; emulsionASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standar
30、d. 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
31、 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 t
32、echnical 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).D6936092
