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LOS ANGELES ABRASION TESTING MACHINE
The Los Angeles Abrasion Testing Machine is used to determine the abrasion resistance (i.e., toughness and hardness) of aggregates, especially for use in road and pavement construction. This test evaluates how well aggregates withstand degradation from friction and impact.
🔧 Los Angeles Abrasion Testing Machine Specifications| Drum (Steel Cylinder) | Inside diameter: 700 mm ± 5 mm Inside length: 520 mm ± 1 mm |
| Thickness of Drum Wall | Minimum 12 mm |
| Rotational Speed | 30–33 revolutions per minute (RPM) |
| Revolution Counter | Pre-settable digital or mechanical counter, up to 1000 revolutions |
| Abrasive Charge (Steel Balls) | 12 hardened steel balls, each of 48 mm diameter, total weight ~5000 ± 25 g |
| Motor | 1–2 HP, geared motor (single or 3-phase, 220V/440V, 50 Hz) |
| Drum Mounting | Supported on stub shafts with sealed bearings |
| Discharge Door | Manual door with locking mechanism for aggregate removal |
| Chassis | Rigid steel frame with anti-vibration mount |
| Power Supply | 220V/440V AC, 50/60 Hz, single or three-phase |
| Standards Compliance | IS: 2386 (Part IV), ASTM C131 / C535, AASHTO T96 |
Tray or Pan: For collecting the material after test
Sieves: 1.70 mm (No. 12) and other required sizes for post-test sieving
Balance: Accurate to at least 1 g for weighing aggregates
Place a specific weight of graded aggregates and abrasive charges into the drum.
Rotate for a specified number of revolutions (typically 500 or 1000).
After rotation, remove and sieve the sample to determine the weight loss.
Loss (%) represents the Los Angeles Abrasion Value (LAV), indicating aggregate toughness.
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Yelahanka, Bangalore, Karnataka 
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