1、Designation: D6084/D6084M 13Standard Test Method forElastic Recovery of Asphalt Materials by Ductilometer1This standard is issued under the fixed designation D6084/D6084M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of
2、 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 assesses the elastic recovery of anasphalt material measured by the recoverable strain determinedaft
3、er severing an elongated briquet specimen of the material ofthe form described in 4.1. The specimens are pulled to aspecified distance at a specified speed and at a specifiedtemperature. Unless otherwise specified, the test shall be madeat a temperature of 25 6 0.5C 77 6 0.9F and with a speedof 5 cm
4、/min 6 5%.1.2 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 may result in non-confor
5、mancewith the standard.1.3 WarningMercury has been designated by the UnitedStates Environmental Protection Agency and many state agen-cies as a hazardous material that can cause central nervoussystem, kidney and liver damage. Mercury, or its vapor, may behazardous to health and corrosive to material
6、s. Caution shouldbe taken when handling mercury and mercury containingproducts. See the applicable Material Safety Data Sheet(MSDS) for details and EPAs website (http:/www.epa.gov/mercury/index.htm) for additional information. Users shouldbe aware that selling mercury and/or mercury containingproduc
7、ts into your state may be prohibited by state law.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 r
8、egulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD5 Test Method for Penetration of Bituminous MaterialsD113 Test Method for Ductility of Bituminous MaterialsD1754 Test Met
9、hod for Effects of Heat and Air on AsphalticMaterials (Thin-Film Oven Test)D2872 Test Method for Effect of Heat and Air on a MovingFilm of Asphalt (Rolling Thin-Film Oven Test)D6934 Test Method for Residue by Evaporation of Emulsi-fied AsphaltD6997 Test Method for Distillation of Emulsified AsphaltD
10、7403 Test Method for Determination of Residue of Emul-sified Asphalt by Low Temperature Vacuum DistillationD7497 Practice for Recovering Residue from EmulsifiedAsphalt Using Low Temperature Evaporative TechniqueE1 Specification for ASTM Liquid-in-Glass ThermometersE11 Specification for Woven Wire Te
11、st Sieve Cloth and TestSievesE77 Test Method for Inspection and Verification of Ther-mometersE220 Test Method for Calibration of Thermocouples ByComparison TechniquesE644 Test Methods for Testing Industrial Resistance Ther-mometersE1137/E1137M Specification for Industrial Platinum Resis-tance Thermo
12、metersE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.44 onRheological Tests.Current edition approved Nov. 1,
13、 2013. Published December 2013. Originallyapproved in 1997. Last previous edition approved in 2006 as D6084 06. DOI:10.1520/D6084_D6084M-13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volum
14、e 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 States13. Significance and Use3.1 This test method is useful in confirming that a materialhas been added to the as
15、phalt to provide a significant elasto-meric characteristic. It does not necessarily identify the type oramount of material added.4. Apparatus4.1 MoldThe mold3shall be similar in design to thatshown in Fig. 1. The mold shall be made of brass, 10.0 6 0.1mm thick, the ends b and b being known as clips,
16、 and the partsa and a as sides of the mold, with a brass base plate that islarger than the assembled mold. The dimensions of theassembled mold shall be as shown in Fig. 1 with the permis-sible variations indicated. (See Note 1.)4.2 Water Bath for Conditioning SpecimenMaintain thewater bath at the sp
17、ecified test temperature, varying not morethan 0.5C 0.9F from this temperature. The volume of watershall be not less than 10 L, and the specimen immersed to adepth of not less than 2.5 cm.4.3 Testing MachineFor elongating the briquet of asphaltmaterial, any apparatus may be used that is so construct
18、ed thatthe specimen will be continuously immersed in water, whilethe two clips are pulled apart at a uniform speed, as specified,without undue vibration. A variation of 65 % is permissible.The water in the tank of the testing machine shall cover thespecimen both above and below it by at least 2.5 cm
19、 and shallbe maintained within 60.5C 0.9F of the test temperature.The testing machine shall incorporate a means by which theelongation can be measured in centimetres. (See Note 2.)4.4 ThermometerA thermometer for monitoring the tem-perature of the water bath. The thermometer shall be one of thefollo
20、wing:4.4.1 A liquid-in-glass thermometer of suitable range withsubdivisions and maximum scale error of 0.1C 0.2F whichconforms to the requirements of Specification E1. The ther-mometer shall be standardized in accordance with one of themethods in Test Method E77.4.4.2 A liquid-in-glass thermometer o
21、f suitable range withsubdivisions and maximum scale error of 0.1C 0.2F whichconforms to the requirements of Specification E2251. Thethermometer shall be standardized in accordance with one ofthe methods in Test Method E77.4.4.3 Aplatinum resistance thermometer (PRT) with a probewhich conforms to the
22、 requirements of Specification E1137/E1137M. The PRT shall have a 3- or 4-wire configuration andthe overall sheath length shall be at least 50 mm 2 in. greaterthan the immersion depth. The PRT system (probe and readout)shall be standardized in accordance with Test Methods E644.Corrections shall be a
23、pplied to ensure measurements within0.1C 0.2F.4.4.4 A metal-sheathed thermistor with a sensor substan-tially similar in construction to the PRT probe described in4.4.3. The thermistor system (sensor and readout) shall bestandardized in accordance with Test Methods E644. Correc-tions shall be applied
24、 to ensure measurements within 0.1C0.2F.4.5 ScissorsAny type of conventional scissors capable ofcutting the bituminous material at the test temperature.4.6 OvenAn oven capable of maintaining 135 6 5C 2756 10F.4.7 Sieves300-m No. 50 and 850-m No. 20 sieves,75 mm 3 in. in diameter, in accordance with
25、SpecificationE11.4.8 Release AgentA mixture such as glycerin withDextrin, talc or Kaolin (china clay) or 1 g Versamid Resin per100 g castor oil (not generic mineral oil) used to coat thebottom and sides of the mold to prevent the specimen fromsticking to the mold. Other materials may be used for thi
26、spurpose if they have been shown not to affect the physicalproperties of the test specimen.4.9 Trimming ToolA straight-edged putty knife or spatula.NOTE 1Clips for the mold are the same as specified in Fig. 1 of TestMethod D113.NOTE 2The testing machine may be the same as specified in TestMethod D11
27、3.3The sole source of supply of the apparatus known to the committee at this timeis Humboldt Manufacturing Company, 7300 W. Agatite Ave., Chicago, IL 60656. Ifyou are aware of alternative suppliers, please provide this information to ASTMHeadquarters. Your comments will receive careful consideration
28、 at a meeting of theresponsible technical committee1, which you may attend.SpacerA 36.0 0.5 mmB 300.5mmC 170.25mmD 60.1mmE 100.1mmFIG. 1 Mold for Elastic Recovery Test SpecimenD6084/D6084M 132NOTE 3In those cases where the elastic recovery specimens areconditioned in the standard penetration bath at
29、 25C 77F, the thermom-eter as prescribed for Test Method D5 may be used.5. Sample Preparation5.1 Emulsified Asphalt ResidueIf the sample is a residualproduct recovered from emulsified asphalt by means of themethods described in Test Methods D6934, D6997, D7403,orPractice D7497, stir the heated resid
30、ue and immediately pourportions of the residue into suitable molds for making therequired tests. If it is suspected there is foreign matter in theresidue, pour the material through a 300 m No. 50 sieve thathas been preheated at 135 6 5C 275 6 10F prior to pouringinto the test molds. (See Note 4.)5.2
31、 Unaged SampleIf the sample is an asphalt binder,carefully heat the sample in a covered container to preventlocal overheating until it has become sufficiently fluid to pour.Use an oven set at 135 6 5C 275 6 10F for sample heating.If it is suspected that the sample contains foreign matter, strainthe
32、melted sample through a 300 m No. 50 sieve that hasbeen preheated at 135 6 5C 275 6 10F. (See Note 5.)5.3 Aged SampleIf the sample is a conditioned residueobtained from Test Method D1754 or D2872, combine theresidue into a single container, cover, and heat in an oven set at135 6 5C 275 6 10F. If it
33、is suspected that the samplecontains foreign matter, strain the melted sample through a300-m No. 50 sieve that has been preheated at 135 6 5C275 6 10F. (See Note 5.)NOTE 4In the case of higher viscosity emulsified asphalt residues orresidues from lower temperature distillations that will not pass a
34、300-m(No. 50) sieve, an 850-m (No. 20) sieve may be used.NOTE 5In those cases where the samples are not sufficiently fluid topour at 135C 275F, higher temperatures may be used. In the case ofhigher viscosity materials that will not pass a 300 m No. 50 sieve, an850 m No. 20 sieve may be used.6. Proce
35、dure6.1 Assemble the mold on the brass plate. Thoroughly coatthe surface of the plate and the interior surfaces of the sides ofthe mold, a and a, with a thin layer of release agent to preventthe test material from sticking. The plate upon which the moldshall be placed shall be perfectly flat and lev
36、el so that thebottom surface of the mold will be in contact throughout. Aftersample preparation as described in Section 5, thoroughly stirthe sample and pour into the mold. In filling the mold, take carenot to disarrange the pieces of the mold, thus distorting theshape. In filling, take care to pour
37、 and place material in astream back and forth from end to end until the mold is morethan level full. Allow the filled mold to cool to room tempera-ture for 35 6 5 min. Then place in the water bath at the testtemperature for 30 6 5 min. Remove the test specimens fromthe water bath and immediately tri
38、m the excess material with ahot trimming tool to make the molds just level full. (See Note6.)6.2 Keeping Specimens at Standard TemperaturePlace thetrimmed specimen and mold in the water bath at the specifiedtest temperature for 90 6 5 min prior to testing. Remove thespecimen from the plate by a shea
39、ring action between speci-men and plate, avoiding any bending of the test specimen.Remove the side pieces a and a being careful not to distort orfracture the specimen. Attach the specimen to the testingmachine and immediately test the specimen.6.3 Testing, Procedure AAttach the rings at each end oft
40、he clips to the pins or hooks in the testing machine and pull thetwo clips apart at a uniform speed to an elongation of 10 60.25 cm unless otherwise specified. Stop the elongation andimmediately cut the test specimen into two halves at themidpoint using the scissors. Allow the specimen to remain int
41、he testing machine in an undisturbed condition at the specifiedtemperature for a period of 60 min. After the 60-min timeperiod, carefully move the traveling carriage back to a positionwhere the ends of the specimens just touch. If the specimenends have sagged, carefully lift them to their original l
42、evelprior to adjusting the ends to touch. Record the total length ofthe specimen with the severed ends just touching each other.6.4 Testing, Procedure BAttach the rings at each end ofthe clips to the pins or hooks in the testing machine and pull thetwo clips apart at a uniform speed to an elongation
43、 of 20 60.25 cm. Stop the elongation and maintain the specimen in thisposition for 5 min. Then cut the test specimen into two halvesat the midpoint using the scissors. Allow the specimen toremain in the testing machine in an undisturbed condition at thespecified temperature for a period of 60 min. A
44、fter the 60-mintime period, carefully move the traveling carriage back to aposition where the ends of the specimens just touch. If thespecimen ends have sagged, carefully lift them to their originallevel prior to adjusting the ends to touch. Record the totallength of the specimen with the severed en
45、ds just touching eachother.6.5 If the asphalt material comes in contact with the surfaceof the water or the bottom of the bath, the test shall not beconsidered normal. Adjust the specific gravity of the bath bythe addition of either methyl alcohol, ethylene glycol, orsodium chloride so that the asph
46、alt material neither comes tothe surface of the water, nor touches the bottom of the bath atany time during the test, and rerun the test. If the samplefractures before reaching the specified elongation, the test shallnot be considered normal.NOTE 6Mixing of clips and sides from different manufacture
47、rs mayresult in sample dimensions other than specified. Measure the width at thecross section of the assembled mold and compare to Fig. 1.7. Calculation and Report7.1 Calculate the percent recovery as follows:Recovery,%5E 2 XE3100 (1)where:E = original elongation of the specimen, cm, andX = elongati
48、on of the specimen, at the completion of thespecified recovery time, with severed ends justtouching, cm.7.1.1 Report to the nearest whole percent the average ofthree normal tests as the elastic recovery of the sample.D6084/D6084M 1337.2 If a normal test is not obtainable on three tests, report theel
49、astic recovery as being unobtainable under the conditions ofthe test.7.3 It is suggested that a form sheet as shown in Fig. 2 beused to record the specific test conditions and results.7.3.1 Record the sample thermal history handlinginformation, such as distillation temperature (if applicable), thepouring temperature, and whether or not the sample has beenreheated, as shown in Fig. 2.8. Precision and Bias48.1 Procedure A PrecisionCriteria for judging the accept-
