ASTM D 36/D 36M - 09 Standard Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)

American Society for Testing and Materials (ASTM). Current edition approved Dec. 15, 2009. Published January 2010. 4 p. This test method covers the determination of the softening point of bitumen in the range from 30 to 157°C [86 to 315°F] using the ring-and-ball apparatus immersed in distilled water [30 to 80°C] or USP glycerin (above 80 to 157°C).