5.4.5. Los Angeles Abrasion Test (IS 2386 Part IV)

Try these first

1. 1.

   What is the Los Angeles Abrasion Test used for?

   Hint

   Think about what properties aggregates need in construction.

2. 2.

   What is a desirable Los Angeles Abrasion Value for aggregates?

   Hint

   Recall our discussion about durability.

3. 3.

   What does the Los Angeles Abrasion Test assess?

   • Concrete strengths
   • Abrasion resistance of aggregates
   • Mixing procedures

   Hint

   Focus on the primary purpose of the test.

4. 4.

   True or False: A higher LAAV indicates better performance for aggregates.

   • True
   • False

   Hint

   Remember what we defined as acceptable values.

5. 5.

   An aggregate sample weighs 600g before the Los Angeles Abrasion Test and 550g afterwards. What is the LAAV? Discuss its suitability for a structural application.

   Hint

   Calculate the wear and compare to the standards discussed in class.

6. 6.

   Explain the steps you would take if test results showed an LAAV of 35%. Describe recommendations for potential changes in aggregate sourcing.

   Hint

   Think about the implications of the test results on construction projects.