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The resistance to wear or hardness is one of the important properties of road aggregates.The purpose of the Los Angeles test is to measure degradation of mineral aggregates of standard grading caused by group of action involving abrasion, attrition, impact and grinding in a rotating steel drum containing, a specified number of steel spheres, the number depending upon the grading of test sample.After the prescribed number of revolutions, the contents are removed from the drum and the aggregate portion is sieved to measure the degradation as percent loss.That means the aggregates should be hard enough to resist abrasion.
The resistance to wear or hardness is one of the important
properties of road aggregates. Road aggregates are subjected to
wearing action as a result of movements of traffic. That means the
aggregates should be hard enough to resist abrasion. Abrasion
test includes methods conducted on aggregates such as Los
Angeles abrasion test, Deval Abrasion test, and Dorry Abrasion
test. The loss Angeles Abrasion test is more common in Kuwait.
The purpose of the Los Angeles test is to measure degradation of
mineral aggregates of standard grading caused by group of action
involving abrasion, attrition, impact and grinding in a rotating
steel drum containing, a specified number of steel spheres, the
number depending upon the grading of test sample. When the
drum rotates, a shelf plate picks up the sample and steel spheres
carrying them around until they are moved to the opposite side of
the drum, creating an impact crushing effect. The contents then
roll with in the drum with an abrading and grinding action until
the shelf plate impact and cycle is separated. After the prescribed
number of revolutions, the contents are removed from the drum
and the aggregate portion is sieved to measure the degradation
as percent loss.
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