What it is
Graded particles are checked through standard thickness slots appropriate to each size fraction.
Public test guide
Flakiness index
Measures the proportion of aggregate particles that are unusually thin compared with their size.
Plain-language explanation
What the test tells you.
The project specification controls the exact method and acceptance requirement.
What is used
Prepared aggregate fractions, standard flakiness gauge and balance.
What it determines
The mass percentage of particles classified as flaky.
Why it matters
Controls particle shape because excessive flaky particles can affect compaction, strength and durability.
Typical test sequence
From sample
to result.
- 01
Separate the aggregate into size fractions
- 02
Gauge each fraction through the specified slots
- 03
Weigh flaky particles and calculate the index
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