Correct Answer - Option 1 : Abrasion test
Explanation:
Los Angeles abrasion test:
- Los Angeles machine or Los Angeles abrasion test on aggregates is used to measure the aggregate toughness and abrasion resistance such as crushing, degradation and disintegration.
- The principle of the Los Angeles abrasion test is to produce abrasive action by use of standard steel balls which when mixed with aggregates and rotated in a drum for a specific number of revolutions also cause the impact on aggregates.
- The maximum abrasion value for the wearing course is 30% and for the base course in WBM is 50%.
Some of the important aggregate tests are:–
1) Crushing Test: Resistance to crushing under gradually applied crushing load.
2) Impact Test: To determine the toughness of aggregate.
3) Soundness Test: To determine the resistance of aggregates to weathering action.
4) Abrasion Test: To determine the hardness of aggregates
5) Shape Test: Flaky index, Elongation index, and Angularity number are determined.
6) Smith Test: To find soluble matter in stone aggregates.
7) Specific gravity and Water Adsorption test
8) Stripping value test: Adhesion of Bitumen with aggregates.
