ASTM D6627 D6627M-2011(2016) 0141 Standard Test Method for Determination of a Volatile Distillate Fraction of Cold Asphalt Mixtures《冷沥青混合料挥发性馏份测定的标准试验方法》.pdf

1、Designation: D6627/D6627M 11 (Reapproved 2016)Standard Test Method forDetermination of a Volatile Distillate Fraction of ColdAsphalt Mixtures1This standard is issued under the fixed designation D6627/D6627M; the number immediately following the designation indicates theyear of original adoption or,

2、in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination, by directmeasurement, of the ambient t

3、o 260C 500F volatile distil-late fraction of cold mix asphalt mixtures.1.2 A precision and bias statement for this test method hasnot been developed since this test method is used for researchpurposes or information only. Therefore this test methodshould not be used for acceptance or rejection of a

4、material forpurchasing purposes.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems ma

5、y result in nonconformancewith 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 health practices and determine the applica-bility of regulat

6、ory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D244 Test Methods and Practices for Emulsified AsphaltsD979 Practice for Sampling Bituminous Paving MixturesD1461 Test Method for Moisture or Volatile Distillates inBituminous Paving MixturesD4753 Guide for Evaluating, Selecting

7、, and Specifying Bal-ances and Standard Masses for Use in Soil, Rock, andConstruction Materials Testing3. Significance and Use3.1 This test method is used for determining the amount ofa temperature specific volatile distillate fraction in cold mixasphalt mixtures.4. Apparatus4.1 A Vertical Cylindric

8、al Metal Still, similar to that used inTest Methods D244, having a faced flange at the top to whichthe head is tightly attached by means of a clamp. The head shallbe of a metal, preferably copper or brass, and shall be providedwith a tubular opening of 25 mm 1 in. in inside diameter andan additional

9、 tubular opening of 13 mm 12 in. in insidediameter. Threaded into the 25 mm 1 in. tubular opening is astainless steel or brass fitting connected firmly to a groundglass joint by means of flexible stainless steel or glass tubing.Inserted into the 13 mm 12 in. tubular opening is a metalthermometer wit

10、h a range of 93 to 538C (200 to 1000F)extending 125 mm 5 in. into the metal still and firmlyconnected by means of a graphite ferrule compression fitting.4.2 Condenser, of the water-cooled reflux glass-tube type,having a condenser jacket not less than 400 mm 1534 in. longwith an inner tube 9.5 to 13

11、mm 38 to12 in. in the outsidediameter. The end of the condenser inserted in the ground glassjoint shall be ground off at an angle of 30 from the verticalaxis of the condenser. For mixtures with very volatile solvents,it may be necessary to supplement this water-cooled condenserwith a second water-co

12、oled condenser of approximately thesame dimensions.4.3 Collection Flask, cylinder of well-annealed glass havinga capacity of 100 mL3.4 fl oz. graduated with divisions of 0.1mL 0.003 fl oz. and attached to the condenser(s) by means ofa well-annealed glass bend. The glass bend attaching thecondenser t

13、o the graduated cylinder is secured by ground glassjoints on either end and vented witha3mm18 in. vent on topof the bend directly above the graduated cylinder to preventpressure in the apparatus. The collection flask is submerged tothe top of the gradations in an ice bath.4.4 Distillation Liquid, 40

14、 mL 1.4 fl oz. of distilled water.4.5 Heating Device, of high temperature electrical heatingtape wrapped around the entire still and the connecting tubingbetween the still and condenser. A variable voltage transformer1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving

15、 Materials and is the direct responsibility of Subcommittee D04.27 onCold Mix Asphalts.Current edition approved Oct. 1, 2016. Published October 2016. Originallyapproved in 2001. Last previous edition approved in 2011 as D6627/D6627M 11.DOI: 10.1520/D6627_D6627M-11R16.2For referenced ASTM standards,

16、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

17、-2959. United States1connected to the heating tape is used to control the rate oftemperature rise to approximately 5C (10F) per minute.Insulate the entire still, including the connecting tubing fromthe still to the condenser, with 25 mm 1 in. of fiberglassinsulation to prevent heat loss.4.6 Balance

18、for Weighing, conforms to Specification D4753for Class GP2.5. Sampling5.1 Sampling shall be carried out in accordance with Prac-tice D979. The sample shall be obtained and sealed at theproduction site within 30 s after completion of the asphaltmixture production cycle.5.2 The sample shall be represe

19、ntative of the material andshall preferably be of such size to fill a friction top metal pail.A metal pail of 1 L (14 gal) capacity is preferred; however, afriction top metal pail of 2 L (12 gal) capacity is allowed. Keepthe pail tightly sealed at all times to avoid loss of volatiles.6. Sample and T

20、est Specimen6.1 After obtaining a 700 6 5 g mass from the representa-tive sample as described in 5.1 and 5.2, record the mass of thesample to 0.1 g 0.004 oz. Keep the remainder of the samplein the tightly covered container.7. Procedure7.1 After the sample has been placed in the still, add 40 mL1.4 f

21、l oz. of distilled water.7.2 Assemble the components of the apparatus as illustratedin Fig. 1. Make all connections liquid and vapor tight. Insert agasket of heavy paper moistened with distilled water, or anonabsorbent gasket, between the still body and cover. Thecondenser tube and collection flask

22、shall be clean to assure freedrainage into the collection flask.7.3 Apply heat so that the rate of temperature rise isapproximately 5C 10F per minute. Maintain the sampletemperature at 260 6 5C 500 6 10F, for 15 min. Ifcondensate is being collected at the end of the 15 min period,continue distillati

23、on until no condensate is being collected. Themaximum hold period at test temperature shall not exceed 30min.7.4 Record the volume of diluent in the collection flask tothe nearest 0.1 mL 0.003-fl oz. scale division. If applicable,transfer the sample to a clean, inert glass container, seal, andplace

24、in refrigerator for distillate determination.NOTE 1The diluent is lighter than water, will be on top of the waterin the collection flask, and will tend to appear cloudy.8. Calculation8.1 Calculate the volatile distillate as follows:diluent,%5diluent vol, in collection flask! 3 diluent density at 25C

25、!original mass of sample3100 (1)NOTE 2Assume density of diluent based on knowledge of diluent typeor values in the range of 0.85 to 0.90 g/cm353.06 to 56.10 lb/ft3, as setforth in accordance with Test Method D1461.9. Precision and Bias9.1 This test method was formerly part of Test MethodD1461. The s

26、tatements on repeatability and reproducibilityfound in Test Method D1461 are in the process of beingupdated.FIG. 1 Assembly with Collection FlaskD6627/D6627M 11 (2016)29.2 A precision and bias statement for the test method hasnot been developed since this test method is used for researchpurposes or

27、information only. Therefore this test methodshould not be used for acceptance or rejection of a material forpurchasing purposes.10. Keywords10.1 cold asphalt mixtures; cold mix; distillation; volatilesASTM International takes no position respecting the validity of any patent rights asserted in conne

28、ction with any item mentionedin this standard. 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 responsi

29、ble technical committee and must be reviewed 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 co

30、nsideration at a meeting of theresponsible technical 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

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