ASTM D490-92(2001)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D 490 – 92 (Reapproved 2001)
Standard Specification for
Road Tar
This standard is issued under the fixed designation D 490; 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 (e) 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 D 140 Practice for Sampling Bituminous Materials
D 1665 Test Method for Engler Specific Viscosity of Tar
1.1 This specification covers 14 grades of tar as follows:
Products
RT-1, RT-2, RT-3, RT-4, RT-5, RT-6, RT-7, RT-8, RT-9, RT-10,
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:
4. Sampling
D 4 Test Method for Bitumen Content
3 4.1 The material shall be sampled in accordance with
D 20 Test Method for Distillation of Road Tars
Practice D 140.
D 36 TestMethodforSofteningPointofBitumen(Ringand
Ball Apparatus)
5. Test Methods
D 70 Test Method for Specific Gravity and Density of
3 5.1 The properties enumerated in Table 1 shall be deter-
Semi-Solid Bituminous Materials
mined in accordance with the following methods, with the
D 95 Test Method for Water in Petroleum Products and
4 exception of the test specified in 5.1.3:
Bituminous Materials by Distillation
3 5.1.1 Water—Test Method D 95.
D 139 Test Method for FloatTest for Bituminous Materials
5.1.2 Specific Gravity— Test Method D 70.
5.1.3 Specific Viscosity—Test Method D 1665. The results
shall be reported as specific viscosity compared with water at
This specification is under the jurisdiction of ASTM Committee D04 on Road
and Paving Materials and is the direct responsibility of Subcommittee D04.43 on
25°C.
Specifications and Tests for Tar and Tar Products.
5.1.4 Float Test—Test Method D 139.
Current edition approved Feb. 15, 1992. Published May 1992. Originally
e1 5.1.5 Distillation— Test Method D 20.
.
published as D 490 – 38 T. Last previous edition D 490 – 77 (1983)
Annual Book of ASTM Standards, Vol 04.04.
5.1.6 Softening Point— Test Method D 36.
Annual Book of ASTM Standards, Vol 04.03.
5.1.7 Total Bitumen— Test Method D 4.
Annual Book of ASTM Standards, Vol 05.01.
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D 490
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 max 7.0 max 5.0 max 5.0 max 5.0 max 3.0 max
to 200°C
...