1、Designation: D 946 09Standard Specification forPenetration-Graded Asphalt Cement for Use in PavementConstruction1This standard is issued under the fixed designation D 946; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、 last revision. 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 Department of Defense.1. Scope1.1 This specification covers asphalt ce
3、ment for use in theconstruction of pavements.1.2 This specification covers the following penetrationgrades:4050, 120150, and6070, 200300.85100,2. Referenced Documents2.1 ASTM Standards:2D5 Test Method for Penetration of Bituminous MaterialsD36 Test Method for Softening Point of Bitumen (Ring-and-Bal
4、l Apparatus)D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD113 Test Method for Ductility of Bituminous MaterialsD 140 Practice for Sampling Bituminous MaterialsD 1754 Test Method for Effects of Heat and Air on Asphal-tic Materials (Thin-Film Oven Test)D 2042 Test Method for So
5、lubility 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 347F (174C).4.2 The asphalt cement shall conform to the
6、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 and Testing5.1 T
7、he 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 D 140.5.1.2 PenetrationTest Method D5.5.1.3 Softening PointTest Method D36.5.1.4 Flash PointTest Method D92.5.1.5 DuctilityTest Me
8、thod D113.5.1.6 Thin Film Oven TestTest Method D 1754.5.1.7 Solubility in TrichloroethyleneTest Method D 2042.6. Keywords6.1 asphalt cement; pavement; penetration1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcom
9、mittee D04.40 onAsphalt Specifications.Current edition approved July 1, 2009. Published July 2009. Originally approvedin 1947. Last previous edition approved in 1999 as D 946 82 (2005).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceast
10、m.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 no position respecting the validity
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14、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 (phone), 610-832-9555 (fax), or serviceast
15、m.org (e-mail); or through the ASTM website(www.astm.org).TABLE 1 Requirements for Asphalt Cement for Use in Pavement ConstructionPenetration Grade4050 6070 85100 120150 200300Min Max Min Max Min Max Min Max Min MaxPenetration at 77F (25C) 100 g, 5 s 40 50 60 70 85 100 120 150 200 300Flash point, F
16、(Cleveland open cup) 450 . 450 . 450 . 425 . 350 .Ductility at 77F (25C) 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 77F (25C) 5 cm/min,
17、 cm after thin-filmoven test test. . 50 . 75 . 100 . 100A.AIf ductility at 77F (25C) is less than 100 cm, material will be accepted if ductility at 60F (15.5C) is 100 cm minimum at the pull rate of 5 cm/min.TABLE 2 Requirements for Penetration Graded Asphalt CementPenetration Grade4050 6070 85100 12
18、0150 200300Min Max Min Max Min Max Min Max Min MaxPenetration at 77F (25C) 100 g, 5 s 40 50 60 70 85 100 120 150 200 300Softening Point, F (C) 120 (49) 115 (46) 108 (42) 100 (38) 90 (32)Flash point, F (Cleveland open cup) 450 . 450 . 450 . 425 . 350 .Ductility at 77F (25C) 5 cm/min, cm 100 . 100 . 1
19、00 . 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 77F (25C) 5 cm/min, cm after thin-filmoven test test. . 50 . 75 . 100 . 100A.AIf ductility at 77F (25C) is less than 100 cm, material will be accepted if ductility at 60F (15.5C) is 100 cm minimum at the pull rate of 5 cm/min.D946092
