- -80%
ASTM D 490 : 1992 : R2016 Standard Specification for Road Tar (Withdrawn 2023)
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CONTAINED IN VOL. 04.03, 2016 Specifies 14 grades of tar: 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.