ASTM D490-92(1997)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: D 490 – 92 (Reapproved 1997)
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 Bituminous Materials by Distillation
D 139 Test Method for Float Test for Bituminous Materials
1.1 This specification covers 14 grades of tar as follows:
D 140 Practice for Sampling Bituminous Materials
RT-1, RT-2, RT-3, RT-4, RT-5, RT-6, RT-7, RT-8, RT-9, RT-10,
D 1665 Test Method for Engler Specific Viscosity of Tar
RT-11, RT-12, RT.C.B.-5, and RT.C.B.-6.
Products
2. Referenced Documents
3. Physical Requirements
2.1 ASTM Standards:
3.1 The tar shall conform to the requirements in Table 1.
D 4 Test Method for Bitumen Content
D 20 Test Method for Distillation of Road Tars
4. Sampling
D 36 Test Method for Softening Point of Bitumen (Ring and
2 4.1 The material shall be sampled in accordance with
Ball Apparatus)
Practice D 140.
D 70 Test Method for Specific Gravity and Density of
Semi-Solid Bituminous Materials
5. Test Methods
D 95 Test Method for Water in Petroleum Products and
5.1 The properties enumerated in Table 1 shall be deter-
mined in accordance with the following methods, with the
exception of the test specified in 5.1.3:
5.1.1 Water—Test Method D 95.
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
25°C.
5.1.4 Float Test—Test Method D 139.
This specification is under the jurisdiction of ASTM Committee D-4 on Road
5.1.5 Distillation— Test Method D 20.
and Paving Materials and is the direct responsibility of Subcommittee D04.43 on
Specifications and Tests for Tar and Tar Products.
5.1.6 Softening Point— Test Method D 36.
Current edition approved Feb. 15, 1992. Published May 1992. Originally
5.1.7 Total Bitumen— Test Method D 4.
e1
published as D 490 – 38 T. Last previous edition D 490 – 77 (1983) .
Annual Book of ASTM Standards, Vol 04.04.
3 4
Annual Book of ASTM Standards, Vol 04.03. Annual Book of ASTM Standards, Vol 05.01.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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 (392°F) . . . . .
...