ASTM D490-92(2011)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D490 −92(Reapproved 2011)
Standard Specification for
Road Tar
This standard is issued under the fixed designation D490; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, 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. Scope D139 Test Method for Float Test for Bituminous Materials
D140 Practice for Sampling Bituminous Materials
1.1 This specification covers 14 grades of tar as follows:
D1665 Test Method for Engler Specific Viscosity of Tar
RT-1, RT-2, RT-3, RT-4, RT-5, RT-6, RT-7, RT-8, RT-9, RT-10,
Products
RT-11, RT-12, RT.C.B.-5, and RT.C.B.-6.
3. Physical Requirements
2. Referenced Documents
3.1 The tar shall conform to the requirements in Table 1.
2.1 ASTM Standards:
D4 Test Method for Bitumen Content
4. Sampling
D20 Test Method for Distillation of Road Tars
D36 Test Method for Softening Point of Bitumen (Ring-and-
4.1 The material shall be sampled in accordance with
Ball Apparatus)
Practice D140.
D70 Test Method for Density of Semi-Solid Bituminous
Materials (Pycnometer Method)
5. Test Methods
D95 Test Method for Water in Petroleum Products and
5.1 The properties enumerated in Table 1 shall be deter-
Bituminous Materials by Distillation
mined in accordance with the following methods, with the
exception of the test specified in 5.1.3:
This specification is under the jurisdiction of ASTM Committee D04 on Road 5.1.1 Water—Test Method D95.
and Paving Materials and is the direct responsibility of Subcommittee D04.43 on
5.1.2 Specific Gravity— Test Method D70.
Specifications and Test for Tar and Tar Products.
5.1.3 Specific Viscosity—Test Method D1665. The results
Current edition approved Dec. 1, 2011. Published December 2011. Originally
shall be reported as specific viscosity compared with water at
approved in 1938. Last previous edition approved in 2001 as D490 – 92 (2005).
DOI: 10.1520/D0490-92R11.
25°C.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1.4 Float Test—Test Method D139.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1.5 Distillation— Test Method D20.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 5.1.6 Softening Point— Test Method D36.
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D490−92(Reapproved 2011)
5.1.7 Total Bitumen— Test Method D4.
D490−92 (2011)
TABLE 1 Requirements for Tar
Grade Grade Grade Grade Grade Grade Grade
RT-1 RT-2 RT-3 RT-4 RT-5 RT-6 RT-7
Water by volume %, max 2.00 2.00 2.00 2.00 1.5 1.5 1.0
Specific gravity at 25/25°C 1.08 1.08 1.09 1.09 1.10 1.10 1.12
(77/77°F), min
A
Specific viscosity:
Engler, 50 mL:
at 40°C (104°F) 5to8 8to13 13 to 22 22 to 35 . . .
at 50°C (122°F) . . . . 17 to 26 26 to 40 .
A
Float test, s:
at 32°C (89.6°F) . . . . . . 50 to 80
at 50°C (122°F) . . . . . . .
Distillation test on water-free
material
Total distillate, mass %:
to 170°C (338°F) 7.0 max 7.0 m
...