AASHTO T96
Full Name
AASHTO T96 – Standard Method of Test for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine
Scope
AASHTO T96 is a standard test method used to assess the durability of small-sized coarse aggregate under combined abrasion and impact forces. This test is crucial for evaluating the aggregate’s resistance to degradation in various construction applications, particularly in pavements subjected to traffic loads and environmental stresses. The test results help in selecting suitable aggregates and predicting their long-term performance in pavements.
Key aspects of AASHTO T 96:
- Principle: the test involves placing a specified amount of aggregate and steel spheres (abrasive charge) inside a large rotating steel drum, the Los Angeles abrasion machine. The drum is rotated for a set number of revolutions, subjecting the aggregate to repeated impacts and abrasion against the steel spheres and the drum’s inner surface.
- Test procedure: the standard outlines a detailed procedure for preparing the aggregate sample, loading the machine, and conducting the test. After the test, the aggregate is sieved to determine the percentage of material that has been worn away, which is reported as the Los Angeles abrasion loss.
- Significance: the Los Angeles abrasion loss value is a valuable indicator of the aggregate’s toughness and resistance to degradation. Lower values indicate a more durable aggregate that is less likely to break down under traffic and environmental loads.
- Applications: AASHTO T96 is widely used in the construction industry for various purposes:
- Aggregate selection: the test helps engineers and contractors select suitable aggregates for specific applications based on their desired durability and performance characteristics.
- Quality control: aggregate producers use this test to ensure the quality and consistency of their products.
- Specification compliance: many construction specifications include limits on the Los Angeles abrasion loss, ensuring that the aggregates used in the project meet the required durability standards.
AASHTO T96 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the AASHTO T96 standard.
Our laboratory offers comprehensive aggregate testing services, including the Los Angeles abrasion test according to AASHTO T96. Our experienced technicians utilize calibrated equipment and adhere to standardized procedures to provide accurate and reliable results for your construction projects.
Contact us for more information.
Resources
Keywords
Los Angeles abrasion; abrasion loss; coarse aggregate; degradation; impact; steel spheres; rotating drum; sieve analysis