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This specification covers 14 grades of road tar as follows: 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. The tar shall conform to the requirements prescribed for (1) water content, (2) specific gravity, (3) specific viscosity, (4) distillate content, (5) softening point of residue from distillation, and (6) total bitumen soluble in carbon disulfide. The properties enumerated shall be determined by the specified test methods including Engler and float tests, distillation test, and ring-and-ball test.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers 14 grades of tar as follows: 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4 Test Method for Bitumen Content
D20 Test Method for Distillation of Road Tars
D36 Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)
D70 Test Method for Density of Semi-Solid Bituminous Materials (Pycnometer Method)
D95 Test Method for Water in Petroleum Products and Bituminous Materials by Distillation
D139 Test Method for Float Test for Bituminous Materials
D140 Practice for Sampling Bituminous Materials
D1665 Test Method for Engler Specific Viscosity of Tar Products
ICS Number Code 93.080.10 (Road construction)
UNSPSC Code 30121700(Road and railroad construction materials)
ASTM D490-92(2011), Standard Specification for Road Tar, ASTM International, West Conshohocken, PA, 2011, www.astm.orgBack to Top