Construction materials testing
Los Angeles Abrasion Machine
A rotating steel drum in which coarse aggregate is tumbled with steel balls for a fixed number of revolutions. The percentage worn down to fines (the LA abrasion value) measures resistance to abrasion and impact.
- Construction materials testing
- Road and highway construction
- Railways
- Quarries
- Academic labs
TROUBLESHOOTING
Common problems, causes and fixes
Abrasion values lower than usual for a known aggregate
Likely causes
- • Spheres worn and under mass
- • Shelf worn or bent
- • Drum speed low
What to do
- • Weigh and replace spheres
- • Replace the shelf
- • Check motor and gearbox; verify speed
Dust escaping
Likely causes
- • Damaged cover gasket
- • Cover not clamped
What to do
- • Replace the gasket
- • Clamp the cover fully
Counter does not stop the drum
Likely causes
- • Counter fault
- • Sensor misaligned
What to do
- • Stop manually and repair the counter
- • Realign the sensor
Drum vibrates or knocks
Likely causes
- • Worn bearings
- • Loose mounting bolts
What to do
- • Replace bearings
- • Tighten the frame to its foundation
In LimsPulse · Calibration Management
Keep every LA abrasion machine in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.