Abrasion test is carried out to find 

Explanation:

Abrasion Test of Aggregates

The abrasion test is performed on aggregates to determine their ability to resist wear and tear, which is crucial for applications like pavements, roads, and other construction projects subjected to traffic and load.

• Purpose of the Test: To evaluate the hardness of aggregates, which reflects their ability to withstand mechanical wear.

• Procedure: Aggregates are subjected to abrasion in a rotating drum (like the Los Angeles Abrasion test setup).

• Importance: Hard aggregates help maintain the durability and service life of structures exposed to continuous wear.

Analyzing the Given Options

1. Option 1: "Hardness of aggregates" (Correct Answer)

   • The abrasion test is primarily designed to measure the hardness of aggregates, which is a critical property for resisting wear.

   • Hard aggregates ensure durability and longevity of construction subjected to mechanical forces.

2. Option 2: "Toughness of aggregates" (Incorrect Answer)

   • Toughness refers to the ability to withstand impact, which is tested through separate methods like the Aggregate Impact Test.

   • The abrasion test does not measure impact resistance or toughness.

3. Option 3: "Durability of aggregates" (Partially Related, but Incorrect)

   • Durability is indirectly linked to hardness, but durability encompasses other factors like chemical resistance and freeze-thaw stability.

   • The abrasion test directly measures hardness, which contributes to durability but does not wholly define it.

   • Hence, this option is not the most accurate answer.

4. Option 4: "Strength of aggregates" (Incorrect Answer)

   • Strength of aggregates refers to their ability to resist crushing and is measured through tests like the Aggregate Crushing Value Test.

   • The abrasion test does not measure compressive or tensile strength.