7.2.2. Hardness

Try these first

1. 1.

   What is hardness in the context of aggregates?

   Hint

   Think about the characteristics of strong materials.

2. 2.

   Name a test used to measure aggregate hardness.

   Hint

   It's named after a city in California.

3. 3.

   What property does hardness measure in aggregates?

   • Strength
   • Abrasion Resistance
   • Size

   Hint

   Focus on wear and tear during usage!

4. 4.

   True or False: The Los Angeles Abrasion Test measures how much weight the aggregate can bear.

   • True
   • False

   Hint

   What aspect of the aggregate does the test emphasize?

5. 5.

   You are tasked with selecting aggregates for a new highway project that will see a high volume of truck traffic. Considering hardness, what properties would you prioritize and why?

   Hint

   Consider traffic load and frequency!

6. 6.

   Evaluate a hypothetical aggregate material that exhibits a high rate of wear during the Los Angeles Abrasion Test. What consequences might this have for a road constructed with such aggregates?

   Hint

   Think about the long-term impact on road safety and maintenance.