1、Designation: D6084/D6084M 18Standard 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 0.5 C 77 6 0.9 F and with a speedof 5
4、cm/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-conf
5、ormancewith 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, maybe hazardous to health and corrosive to mater
6、ials. Cautionshould be taken when handling mercury and mercury-containing products. See the applicable Material Safety DataSheet (MSDS) for details and EPAs website (http:/www.epa.gov/mercury/index.htm) for additional information.Users should be aware that selling mercury and/or mercury-containing p
7、roducts in your state may be prohibited by statelaw.1.4 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consideredas requirements of the standard.1.5 This standard does not purpo
8、rt 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, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard
9、 was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Refer
10、enced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD5/D5M Test Method for Penetration of Bituminous Mate-rialsD113 Test Method for Ductility of Asphalt MaterialsD1754/D1754M Test Method for Effects of Heat and Air on
11、Asphaltic Materials (Thin-Film Oven Test)D2872 Test Method for Effect of Heat and Air on a MovingFilm of Asphalt (Rolling Thin-Film Oven Test)D3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD6934 Test Method for Residue by Evaporation of Emu
12、lsi-fied AsphaltD6997 Test Method for Distillation of Emulsified AsphaltD7403 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
13、 for ASTM Liquid-in-Glass ThermometersE11 Specification for Woven Wire Test 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-mome
14、tersE1137/E1137M Specification for Industrial Platinum Resis-tance ThermometersE2251 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
15、 Subcommittee D04.44 onRheological Tests.Current edition approved July 1, 2018. Published July 2018. Originally approvedin 1997. Last previous edition approved in 2013 as D6084/D6084M 13. DOI:10.1520/D6084_D6084M-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM
16、 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 19428-2959. United StatesThis international standard was
17、developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.13. Significanc
18、e and Use3.1 This test method is useful in confirming that a materialhas been added to the asphalt to provide a significant elasto-meric characteristic. It does not necessarily identify the type oramount of material added.NOTE 1The quality of results produced by this standard is dependenton the comp
19、etence of the personnel performing the procedure and thecapability, calibration, and maintenance of the equipment used. Agenciesthat meet the criteria of Specification D3666 are generally consideredcapable of competent and objective testing, sampling, inspection, etc.Users of this standard are cauti
20、oned that compliance with SpecificationD3666 alone does not completely ensure reliable results. Reliable resultsdepend on many factors; following the suggestions of Specification D3666or some similar acceptable guidance provides a means of evaluating andcontrolling some of those factors.4. Apparatus
21、4.1 MoldThe mold3shall be similar in design to thatshown in Fig. 1. The mold shall be made of brass, 10.0 60.1 mm thick, the ends b and b being known as clips, and theparts a and a as sides of the mold, with a brass base plate thatis larger than the assembled mold. The dimensions of theassembled mol
22、d shall be as shown in Fig. 1, with thepermissible variations indicated. (See Note 2.)4.2 Water Bath for Conditioning SpecimenMaintain thewater bath at the specified test temperature, varying not morethan 0.5 C 0.9 F from this temperature. The volume ofwater shall be not less than 10 L, and the spec
23、imen immersedto a depth of not less than 2.5 cm.4.3 Testing MachineFor elongating the briquet of asphaltmaterial, any apparatus may be used that is so constructed thatthe specimen will be continuously immersed in water, whilethe two clips are pulled apart at a uniform speed, as specified,without und
24、ue 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, and shallbe maintained within 60.5 C 0.9 F of the test temperature.The testing machine shall incorporate a means by which theelongation ca
25、n be measured in centimetres. (See Note 3.)4.4 ThermometerA thermometer for monitoring the tem-perature of the water bath. The thermometer shall be one of thefollowing:4.4.1 A liquid-in-glass thermometer of suitable range withsubdivisions and maximum scale error of 0.1 C 0.2 F whichconforms to the r
26、equirements 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 of suitable range withsubdivisions and maximum scale error of 0.1 C 0.2 F whichconforms to the requirements of Specification E2251. Thet
27、hermometer 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 requirements of Specification E1137/E1137M. The PRT shall have a three- or four-wire configura-tion and the overall sheath length sh
28、all be at least 50 mm 2 in.greater than the immersion depth. The PRT system (probe andreadout) shall be standardized in accordance with Test MethodsE644. Corrections shall be applied to ensure measurementswithin 0.1 C 0.2 F.4.4.4 A metal-sheathed thermistor with a sensor substan-tially similar in co
29、nstruction 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 to ensure measurements within 0.1 C0.2 F.4.5 ScissorsAny type of conventional scissors capable ofcutting the bituminous m
30、aterial at the test temperature.4.6 OvenAn oven capable of maintaining 135 6 5C275 6 10 F.4.7 Sieves300-m No. 50 and 850-m No. 20 sieves,75 mm 3 in. in diameter, in accordance with SpecificationE11.4.8 Release AgentA mixture such as glycerin withDextrin, talc, or Kaolin (china clay), or 1 g Versamid
31、 Resin per100 g castor oil (not generic mineral oil), used to coat thebottom and sides of the mold to prevent the specimen from3The 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
32、 alternative suppliers, please provide this information to ASTMHeadquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.SpacerA 36.0 0.5 mmB 300.5mmC 170.25mmD 60.1mmE 100.1mmFIG. 1 Mold for Elastic Recovery Test Specimen
33、D6084/D6084M 182sticking to the mold. Other materials may be used for thispurpose 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 2Clips for the mold are the same as specified in Fig. 1 of TestMethod D113
34、.NOTE 3The testing machine may be the same as specified in TestMethod D113.NOTE 4In those cases where the elastic recovery specimens areconditioned in the standard penetration bath at 25 C 77 F, thethermometer as prescribed for Test Method D5/D5M may be used.5. Sample Preparation5.1 Emulsified Aspha
35、lt 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 residue and immediately pourportions of the residue into suitable molds for making therequired tests. If it is suspect
36、ed that there is foreign matter inthe residue, pour the material through a 300-m No. 50 sievethat has been preheated at 135 6 5 C 275 6 10 F prior topouring into the test molds. (See Note 5.)5.2 Unaged SampleIf the sample is an asphalt binder,carefully heat the sample in a covered container to preve
37、ntlocal overheating until it has become sufficiently fluid to pour.Use an oven set at 135 6 5 C 275 6 10 F for sampleheating. If it is suspected that the sample contains foreignmatter, strain the melted sample through a 300-m No. 50sieve that has been preheated at 135 6 5 C 275 6 10 F.(See Note 6.)5
38、.3 Aged SampleIf the sample is a conditioned residueobtained from Test Method D1754/D1754M or D2872, com-bine the residue into a single container, cover, and heat in anoven set at 135 6 5 C 275 6 10 F. If it is suspected that thesample contains foreign matter, strain the melted samplethrough a 300-m
39、 No. 50 sieve that has been preheated at 1356 5 C 275 6 10 F. (See Note 6.)NOTE 5In the case of higher viscosity emulsified asphalt residues orresidues from lower temperature distillations that will not pass a 300-m(No. 50) sieve, an 850-m (No. 20) sieve may be used.NOTE 6In those cases where the sa
40、mples are not sufficiently fluid topour at 135 C 275 F, 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. Procedure6.1 Assemble the mold on the brass plate. Thoroughly coatthe surface of the plate an
41、d 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 level so that thebottom surface of the mold will be in contact throughout. Aftersample prep
42、aration 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 and place material in astream back and forth from end to end until the mold is morethan
43、 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 trim the excess material with ahot trimming tool to make the molds just level full. (See No
44、te7.)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 shearing action between speci-men and plate, avoiding any bending of the test specimen.Remov
45、e 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 ofthe clips to the pins or hooks in the testing machine and pull thetwo clips apart at a u
46、niform 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 inthe testing machine in an undisturbed condition at the specifiedtemperature for a perio
47、d 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 levelprior to adjusting the ends to touch. Record the total length ofthe specimen with
48、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 of 20 60.25 cm. Stop the elongation and maintain the specimen in thisposition for 5 m
49、in. 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. After 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
