Correct option is A
Correct Option: A
Given
The Los Angeles Abrasion Test is conducted to determine the resistance of coarse aggregates to abrasion and impact in accordance with IS 2386 (Part IV): 1963.
The abrasive charge consists of steel spheres, and the number of spheres used depends on the grading of the aggregate sample.
For Grade D aggregates, the standard specifies:
- Number of steel spheres = 6
Number of steel spheres = 6
Hence, Option A is correct.
Additional Information
The recommended abrasive charges for different aggregate gradings as per IS 2386 (Part IV): 1963 are:
| Aggregate Grading | Number of Steel Spheres |
| Grade A | 12 |
| Grade B | 11 |
| Grade C | 8 |
| Grade D | 6 |
The Los Angeles Abrasion Test measures the toughness and abrasion resistance of coarse aggregates used in pavement and concrete works. Lower abrasion values indicate better quality and more durable aggregates.
