What it is
A representative aggregate sample is dried, sieved and separated by particle size.
Public test guide
Aggregate grading
Shows the proportion of aggregate particles falling within each standard size range.
Plain-language explanation
What the test tells you.
The project specification controls the exact method and acceptance requirement.
What is used
Sample splitter, drying oven, balance, standard sieves and sieve shaker.
What it determines
Percentage retained and passing each sieve and the overall grading curve.
Why it matters
Controls aggregate production and confirms suitability for concrete, asphalt, road layers, seals or drainage applications.
Typical test sequence
From sample
to result.
- 01
Prepare a representative dry sample
- 02
Sieve through the specified series
- 03
Weigh fractions and compare the grading with limits
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