1、Designation: D946/D946M 09aStandard Specification forPenetration-Graded Asphalt Cement for Use in PavementConstruction1This standard is issued under the fixed designation D946/D946M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision,
2、the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers
3、 asphalt cement for use in theconstruction of pavements.1.2 This specification covers the following penetrationgrades:4050, 120150, and6070, 200300.85100,1.3 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
4、exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2D5 Test Method for Penetration of Bituminous MaterialsD36 Test Method for Softening Point
5、of Bitumen (Ring-and-Ball Apparatus)D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD113 Test Method for Ductility of Bituminous MaterialsD140 Practice for Sampling Bituminous MaterialsD1754 Test Method for Effects of Heat andAir onAsphalticMaterials (Thin-Film Oven Test)D2042 T
6、est Method for Solubility of Asphalt Materials inTrichloroethylene3. Manufacture3.1 Asphalt cement shall be prepared by the refining ofcrude petroleum by suitable methods.4. Properties4.1 The asphalt cement shall be homogeneous and shall notfoam when heated to 175C 350F.4.2 The asphalt cement shall
7、conform to the requirementsgiven in Table 1 or Table 2, as specified by the purchaser. Table2 requirements limit the temperature susceptibility of asphaltover Table 1 requirements. Asphalts that meet Table 2 require-ments will also meet Table 1 requirements of the same grade.5. Methods of Sampling a
8、nd Testing5.1 The material shall be sampled and the properties enu-merated in this specification shall be determined in accordancewith the following ASTM methods:5.1.1 SamplingPractice D140.5.1.2 PenetrationTest Method D5.5.1.3 Softening PointTest Method D36.5.1.4 Flash PointTest Method D92.5.1.5 Du
9、ctilityTest Method D113.5.1.6 Thin Film Oven TestTest Method D1754.5.1.7 Solubility in TrichloroethyleneTest Method D2042.6. Keywords6.1 asphalt cement; pavement; penetration1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibili
10、ty of Subcommittee D04.40 onAsphalt Specifications.Current edition approved Dec. 1, 2009. Published January 2010. Originallyapproved in 1947. Last previous edition approved in 2009 as D946 09. DOI:10.1520/D0946_D0946M-09A.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontac
11、t ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes
12、 no position respecting the validity of any patent rights asserted in connection 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 resp
13、onsibility.This standard is subject to revision at any time by the responsible 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 addresse
14、d to ASTM International Headquarters. Your comments will receive careful consideration 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
15、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 (phon
16、e), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Requirements for Asphalt Cement for Use in Pavement ConstructionPenetration Grade405
17、0 6070 85100 120150 200300Min Max Min Max Min Max Min Max Min MaxPenetration at 25C 77F, 100 g, 5 s 40 50 60 70 85 100 120 150 200 300Flash point, C F (Cleveland open cup) 230 450 . 230 450 . 230 450 . 220 425 . 175 350 .Ductility at 25C 77F, 5 cm/min, cm 100 . 100 . 100 . 100 . 100A.Solubility in t
18、richloroethylene, % 99.0 . 99.0 . 99.0 . 99.0 . 99.0 .Retained penetration after thin-film oven test, % 55 + . 52 + . 47 + . 42 + . 37 + .Ductility at 25C 77F, 5 cm/min, cm after thin-filmoven test test. . 50 . 75 . 100 . 100A.AIf ductility at 25C 77F is less than 100 cm, material will be accepted i
19、f ductility at 15C 60F is 100 cm minimum at the pull rate of 5 cm/min.TABLE 2 Requirements for Penetration Graded Asphalt CementPenetration Grade4050 6070 85100 120150 200300Min Max Min Max Min Max Min Max Min MaxPenetration at 25C 77F, 100 g, 5 s 40 50 60 70 85 100 120 150 200 300Softening Point, C
20、 F 49 120 46 115 42 108 38 100 32 90Flash point, C F, (Cleveland open cup) 230 450 . 230 450 . 230 450 . 220 425 . 175 350 .Ductility at 25C 77F, 5 cm/min, cm 100 . 100 . 100 . 100 . 100A.Solubility in trichloroethylene, % 99.0 . 99.0 . 99.0 . 99.0 . 99.0 .Retained penetration after thin-film oven test, % 55 + . 52 + . 47 + . 42 + . 37 + .Ductility at 25C 77F, 5 cm/min, cm after thin-filmoven test test. . 50 . 75 . 100 . 100A.AIf ductility at 25C 77F is less than 100 cm, material will be accepted if ductility at 15C 60F is 100 cm minimum at the pull rate of 5 cm/min.D946/D946M 09a2
