What it is
Binder discs held in standard rings are heated at a controlled rate while loaded by steel balls.
Public test guide
Ring-and-ball softening point
Measures the temperature at which bitumen softens to a defined degree.
Plain-language explanation
What the test tells you.
The project specification controls the exact method and acceptance requirement.
What is used
Ring-and-ball apparatus, prepared binder, steel balls, bath liquid and temperature measurement.
What it determines
The temperature at which each softened binder disc reaches the specified distance.
Why it matters
Supports binder characterisation and assessment of temperature sensitivity.
Typical test sequence
From sample
to result.
- 01
Prepare binder discs in the standard rings
- 02
Condition and heat the bath at the required rate
- 03
Record the softening temperature at the endpoint
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