Los Angeles Test

Scope

This test is used to determine the resistance of coarse aggregate to impact in a rotating cylinder containing metallic spheres. This test is known as the Los Angeles Abrasion Test.

Sample

- Using the Riffle Box obtain a representative sample of the aggregate.

-Dirty or coated aggregate shall be washed, dried to constant mass at 110 ± 5°C, and cooled to room temperature before preparing the test specimen.

-Separate the aggregate on the required sieve sizes, and prepare the test specimen using the mass of each sieve size fraction specified for the grading selected. Determine and record the mass of the prepared test specimen to the nearest 1 g.


Required Materials and Equipment

• Los Angeles Machine.
• Balance.
• Sieves.
• Abrasive Charge.
-A. Each abrasive charge shall consist of a solid, steel sphere having a mass between 390 and 445 g. A solid, steel sphere with a diameter of 46.5 ± 0.5 mm will typically meet this requirement
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