Softening point test, Civil Engineering

Softening Point Test:

The temperature at which bitumen softens is determined by the "Ring and Ball" test (Figure).

1822_Softening Point Test.png

(a) Diagram of Apparatus at Beginning of Test  (b) Diagram Showing End of Test

Figure : Bitumen Softening Point Test

A brass ring containing bitumen is suspended in a liquid medium (water or glycerin), and a steel ball is placed on the disc of bitumen. The liquid medium is then heated at a specified rate. The temperature at which the softened bitumen touches the bottom plate placed at a specified distance below the ring is recorded as the softening point. A bitumen of penetration grade 30/40 has a softening point of 50-65oC.

Posted Date: 1/22/2013 3:07:36 AM | Location : United States

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