What it is
A representative dry rubber sample is passed through the specified sieve series.
Public test guide
Rubber-crumb grading
Measures the particle-size distribution of rubber crumb used in bitumen-rubber blends.
Plain-language explanation
What the test tells you.
The project specification controls the exact method and acceptance requirement.
What is used
Rubber crumb, balance, standard sieves and sieve shaker.
What it determines
Percentage of rubber particles retained and passing each sieve.
Why it matters
Controls feedstock consistency because particle size affects blending, reaction and application behaviour.
Typical test sequence
From sample
to result.
- 01
Prepare and weigh the representative sample
- 02
Sieve through the specified stack
- 03
Weigh each fraction and compare with the grading limits
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