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), USP glycerine (above 80 to 157°C), or ethylene glycol (30 to 110°C).,
Ring and Ball Apparatus ASTM D36
• Pyrex® jar ∅ 85 × 130 mm
• Two-place brass cage adjustable in height
• two hardened steel balls ∅ 9.5 mm
• two rings with collar for centering the balls
• Heating device unit and motor stirrer
Power Supply
• 220Vac 50/60 Hz