## Importance of Different Testing on Road Aggregates

The importance of different testing on road aggregates are as follows:

1. **Abrasion test**

This test is performed to find out the hardness i.e. resistance to abrasion of the stone aggregate. It is very important to know the aggregate hardness value before it is used in road construction.

**2. Impact test**

This test is carried out to find the toughness i.e resistance to hammering effect of the stone aggregate.

**3. Soundness or Durability test**

This test is done to find durability, that is the resistance to weathering action.

**4. Crushing test**

This test is done to find out the strength of coarse aggregate.

**5. Shape test**

This test is done to find out the percentage of flaky and elongated particles contained in aggregate.

**6. Specific gravity test**

This test is done to find out the specific gravity of aggregate and the unit weight of aggregate.

**7. Water absorption test**

This test is done to know whether the aggregates are porous or not.

**8. Bitumen adhesion test**

This test is carried out to assess the adhesive property of aggregate.

**9. Cementation test**

This test is performed to assess the cementation property of aggregate.

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