Standard Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)
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).
