6.1.2. Hardness

Try these first

1. 1.

   What does hardness signify in road aggregates?

   Hint

   Think about how aggregate materials perform under traffic.

2. 2.

   What is the purpose of the Los Angeles Abrasion Test?

   Hint

   It tests how aggregates wear down.

3. 3.

   What does hardness in aggregates measure?

   • A. Resistance to weathering
   • B. Resistance to abrasion and wear
   • C. Resistance to heat

   Hint

   Consider what 'hardness' typically indicates in materials.

4. 4.

   True or False: The Los Angeles Abrasion Test is the only test used to measure hardness in road aggregates.

   • True
   • False

   Hint

   Think about other tests mentioned in class.

5. 5.

   Evaluate the potential consequences of using aggregates with a hardness below the required standards in a busy urban area.

   Hint

   Consider the budgeting implications and impact on traffic.

6. 6.

   Design a testing plan that includes hardness testing alongside other critical quality control measures for a new road project.

   Hint

   Think about which properties work together to ensure road integrity.