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Unformatted text preview: American University of Sharjah College of Engineering Department of Civil Engineering Instructor: Arshi Faridi E-mail : [email protected] Course: CVE 202 Experiment #: 5B LOS ANGELES ABRASION Purpose: To determine the aggregate resistance to degradation, using the Los Angeles machine according to ASTM C131-96. This procedure is applicable for testing sizes of coarse aggregate smaller than 37.5 mm. Background: Los Angeles abrasion test is a measure of degradation of mineral aggregates of standard grading resulting from a combination of actions including abrasion or attrition, impact, and grinding in a rotating steel drum containing a specified number of steel spheres, the number depending on the grading of the test sample. As the drum rotates, a shelf plate picks up the sample and the steel spheres, carrying them around until they are dropped to the opposite side of the drum, creating an impact-crushing effect. The contents then roll within the drum with an abrading and grinding action until the shelf plate picks up the...
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- Spring '11
- Construction aggregate, Sieve analysis, Los Angeles Machine