7.2. Desirable Properties of Aggregates

Try these first

1. 1.

   What does the strength of aggregates refer to?

   Hint

   Think about how aggregates hold up under heavy vehicles.

2. 2.

   What are the acceptable limits for water absorption in aggregates?

   Hint

   Consider why aggregates should not retain too much moisture.

3. 3.

   What property of aggregates helps them resist wear?

   • Strength
   • Hardness
   • Durability

   Hint

   Consider how materials behave in grinding or scraping situations.

4. 4.

   True or False: Low water absorption in aggregates is desirable.

   • True
   • False

   Hint

   Think about how water affects the strength of materials.

5. 5.

   A new type of aggregate has high tensile strength but very poor toughness. Discuss the potential implications on pavement performance.

   Hint

   Think of how a sturdy object can still break when hit hard.

6. 6.

   You have two aggregates: one with a high absorption rate and another with low absorption. Predict how these might affect the durability and performance of the pavement.

   Hint

   Consider how moisture impacts materials in general.