1、Designation: D2042 15Standard Test Method forSolubility of Asphalt Materials in Trichloroethylene1This standard is issued under the fixed designation D2042; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、 A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This test method covers the determination of t
3、he degreeof solubility in trichloroethylene of asphalt materials havinglittle or no mineral matter.NOTE 1This method is not applicable to tars and their distillationresidues or highly cracked petroleum products. For methods covering tars,pitches, and other highly cracked petroleum products, and the
4、use of othersolvents, see Test Methods D4, D2318, and D2764.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and foot
5、notes(excluding those in tables and figures) shall not be consideredas requirements of the standard.1.4 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 heal
6、th practices and determine the applica-bility of regulatory limitations prior to use. Specific precautionstatements are given in Section 7.2. Referenced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD4 Test Method for
7、 Bitumen ContentD2318 Test Method for Quinoline-Insoluble (QI) Content ofTar and PitchD2764 Test Method for Dimethylformamide-Insoluble(DMF-I) Content of Tar and PitchD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving Materials2.2 AASHTO Standard:3T44 S
8、olubility of Bituminous Materials in Organic Solvents3. Summary of Method3.1 The sample is dissolved in trichloroethylene and filteredthrough a glass fiber pad. The insoluble material is washed,dried, and weighed.4. Significance and Use4.1 This test method is a measure of the solubility of asphaltin
9、 trichloroethylene. The portion that is soluble in trichloroeth-ylene represents the active cementing constituents.NOTE 2The quality of the results produced by this standard aredependent on the competence of the personnel performing the procedureand the capability, calibration, and maintenance of th
10、e equipment used.Agencies that meet the criteria of Specification D3666 are generallyconsidered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance withSpecification D3666 alone does not completely assure reliable results.Reliable
11、results depend on many factors; following the suggestions ofSpecification D3666 or some similar acceptable guideline provides ameans of evaluating and controlling some of these factors.5. Apparatus and Materials5.1 The assembly of a typical filtering apparatus is illus-trated in Fig. 1. Details of t
12、he component parts are as follows:5.1.1 Bitumen Crucible or Gooch Crucible, glazed insideand outside with the exception of outside bottom surface. Theapproximate dimensions shall be a diameter of 44 mm at thetop, tapering to 36 mm at the bottom, and a depth of 20-30 mm.5.1.2 Glass Microfiber Filter
13、Pad, 3234 mm diameter, fineporosity, fast flow rate, 1.5 m particle retention.5.1.3 Filter Flask, heavy-wall, with side tube, 250-, 500-, or1000-mL capacity.5.1.4 Filter Tube, 40- to 42-mm inside diameter.5.1.5 Rubber Tubing or Adapter, for holding the crucible onthe filter tube.1This test method is
14、 under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.47 onMiscellaneous Asphalt Tests.Current edition approved June 1, 2015. Published July 2015. Originally approvedin 1966. Last previous edition approved in 2009 as D2042 09.
15、DOI: 10.1520/D2042-15.2For 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.3Available from American Association of
16、 State Highway and TransportationOfficials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,http:/www.transportation.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1NOTE 3Other suitable assemblies permitting vacuu
17、m filtration with acrucible may be used.5.1.6 Erlenmeyer Flask, 125 mL.5.1.7 Oven, capable of maintaining a temperature of 110 65C.6. Reagent6.1 Trichloroethylene, technical grade.7. Safety Precautions7.1 Trichloroethylene is toxic, and good ventilation shouldbe provided.8. Preparation of Crucible8.
18、1 Place the crucible plus one thickness of the filter pad inan oven at 110 6 5C for 15 min, allow to cool in a desiccatorfor 30 6 5 min, and then determine the mass to the nearest 0.1mg. Designate this mass as A. Store in the desiccator untilready for use.9. Sample Preparation9.1 If the sample is no
19、t fluid, heat to any convenienttemperature, but in any case not more than 100C above thesoftening point. Normally the temperature at which this test isrun is not critical, and it may be performed at the laboratory airtemperature. For referee tests, however, the flask and sample insolution shall be p
20、laced in a water bath maintained at 38.0 60.3C for 1 h before filtering.10. Procedure10.1 Note safety precautions in Section 7. Transfer approxi-mately2gofthesample into a tared 125-mL Erlenmeyer flaskor other suitable container. Smaller sample sizes may benecessary if more than 0.5 % insoluble mate
21、rial is expected.Allow the sample to cool to ambient temperature and thendetermine the mass to the nearest 1 mg. Designate this mass asB. Add 100 mL of the trichloroethylene to the container insmall portions with continuous agitation until all lumps disap-pear and no undissolved sample adheres to th
22、e container.Stopper the flask or otherwise cover the container and set asidefor at least 15 min (see Section 9.1).10.2 Place the previously prepared and weighed crucible inthe filtering tube. Wet the filter pad with a small portion oftrichloroethylene and decant the solution through the filter padof
23、 the crucible with or without light suction as may benecessary. When the insoluble matter is appreciable, retain asmuch of it as possible in the container until the solution hasdrained through the mat. Wash the container with a smallamount of solvent and, using a stream of solvent from a washbottle,
24、 transfer all insoluble matter to the crucible. Use a“policeman” if necessary to remove any insoluble matteradhering to the container. Rinse the policeman and containerthoroughly. Wash the insoluble matter in the crucible withsolvent until the filtrate is substantially colorless, then applystrong su
25、ction to remove the remaining solvent. Remove thecrucible from the tube, wash the bottom free of any dissolvedmatter, and place the crucible on top of an oven or on a steambath until all odor of the trichloroethylene is removed (seesafety precautions in Section 7). Place the crucible in an ovenat 11
26、0 6 5C for at least 20 min. Cool the crucible in adesiccator for 30 6 5 min and determine its mass to the nearest0.1 mg. Repeat the drying and weighing until constant mass (60.3 mg) is obtained. Designate this mass as C.NOTE 4To obtain precise results, the cooling time in the desiccatormust be appro
27、ximately the same (within 65 min) after all heatings. Forexample, if the mass of the empty crucible is determined after a 30-mincooling period in the desiccator, the mass of the crucible containing theinsoluble matter should be determined after a 30 6 5-min cooling periodin the desiccator. Either em
28、pty crucibles or crucibles containing insolublematter that have remained in a desiccator overnight should be reheated inan oven for at least 30 min, then allowed to cool for the prescribed periodbefore the mass is determined.11. Calculation and Report11.1 Calculate either the total percentage of ins
29、oluble matteror the percentage of the sample soluble in the solvent used asfollows:% Insoluble 5SC 2 ABD3100 (1)% Soluble 5SB 2 C 2 A!BD3100 (2)where:A = mass of crucible and filter,B = mass of sample, andFIG. 1 Filtering Apparatus AssemblyD2042 152C = mass of crucible, filter and insoluble material
30、.11.2 For percentages of insoluble less than 1.0, report to thenearest 0.01 %. For percentages of insoluble 1.0 or more,report to the nearest 0.1 %.12. Precision12.1 AASHTO Materials Reference Laboratory (AMRL)data for Test Method D2042 (and its AASHTO equivalentstandard, T44) were analyzed in 2001
31、as prescribed in PracticeC670. These data represent approximately 13 200 repetitionsof the test, conducted on 132 samples having solubility valuesbetween 99.5 % and 100.0 %. For samples within this range,the analysis suggests the following precision values are appro-priate:Multilab Standard Deviatio
32、n (1S) = 0.01 + (0.75 % Insoluble)Single-Operator Standard Deviation (1S) = 0.01 + (0.25%Insoluble)12.2 Since there is no accepted reference material suitablefor determining the bias in this test method, no statement onbias is made.13. Keywords13.1 asphalt; Gooch crucible; solubility; trichloroethyl
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