ASTM C535
Full Name
ASTM C535 – Standard Test Method for Resistance to Degradation of Large-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine
Scope
ASTM C535 is a standard test method used to measure the degradation of large-sized coarse aggregates due to a combination of abrasion, impact, and grinding. This is achieved by using the Los Angeles abrasion machine, a rotating steel drum containing steel spheres.
The primary purpose of this test method is to assess the toughness and abrasion resistance of coarse aggregates used in construction applications. The results of this test are used to classify aggregates for various uses, such as in concrete pavements, asphalt pavements, and railroad ballast.
Key points about the scope of ASTM C535:
- Aggregate size: the standard applies to aggregates with a maximum size of 37.5 mm (1 1/2 in) and a minimum size of 19 mm (3/4 in).
- Test procedure: it involves placing the aggregate sample and steel spheres in the Los Angeles abrasion machine and rotating it for a specified number of revolutions (typically 500).
- Result: the percentage of material finer than 1.70 mm (No. 12) sieve after the test is reported as the Los Angeles abrasion value, which indicates the resistance of the aggregate to degradation.
The Los Angeles abrasion test is a widely used method for evaluating the quality of coarse aggregates in the construction industry. It is considered a reliable indicator of the aggregate’s performance in applications subjected to abrasion and impact.
ASTM C535 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C535 standard.
Contact us today to learn more about our aggregate testing capabilities.
Resources
Keywords
Los Angeles abrasion machine; coarse aggregate; abrasion resistance; degradation; impact; grinding; steel spheres; percentage loss; sieve analysis