Crushing Machine Operator how-to
How to Run a Gradation Test on Aggregate
Gradation proves product meets spec.
Quick answer
Gradation proves product meets spec. In short: take; dry; weigh, then complete the remaining steps below.
Step by step
Take a representative sample.
Dry it.
Weigh.
Shake through sieves.
Weigh each sieve.
Compare to spec.
Safety reminders for crushing machine operators
- Lock out before clearing jams
- Wear respirators for silica
- Guard conveyors
- Follow MSHA rules
Key terms
Jaw crusher · Cone crusher · Gradation · Screen deck · Aggregate · Liner: see the full crushing machine operator glossary.