5.2.2.3. Abrasion Resistance (Los Angeles Abrasion Value - LAAV)

Try these first

1. 1.

   What does LAAV stand for?

   Hint

   Think about the location it is named after.

2. 2.

   Why is LAAV important in construction?

   Hint

   Consider what happens to concrete under friction.

3. 3.

   What is the maximum desirable LAAV for aggregates used in high-strength concrete?

   • 20%
   • 30%
   • 40%

   Hint

   Remember the standard for quality in construction.

4. 4.

   True or False: A lower LAAV is better for concrete durability.

   • True
   • False

   Hint

   Think about the effects of wear on concrete over time.

5. 5.

   Calculate the LAAV percentage if an initial weight of aggregates is 1000g and after the test, it weighs 970g. What does this indicate?

   Hint

   Use the formula for LAAV calculation.

6. 6.

   Explain how selecting an aggregate with a LAAV of 35% could potentially impact a highway's longevity.

   Hint

   Consider long-term traffic and environmental effects on high-exposure areas.