Page 44 - Lecture Notes DCC3113

Figure 3-9: Aggregate Impact Value Equipment

iv. Los Angeles Abrasion

To determine the percent of degradation under combination of
abrasion or attrition, impact and grinding. Aggregates weight 5000
gram are placed in a steel drum with specified number of steel balls.
Drum is rotated 500 revolutions at 33 rpm. Then, aggregates are
sieved with 1.70mm sieve size and calculate :
Steel Balls

Result before and after
rotate in steel drum

Figure 3-10: Los Angeles Abrasion

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