7.2.7. Cleanliness

Try these first

1. 1.

   What are aggregates?

   Hint

   Think about the ingredients used in concrete.

2. 2.

   What does cleanliness refer to in aggregates?

   Hint

   Consider what could ruin the bonding process.

3. 3.

   What is the main purpose of cleanliness in aggregates?

   • A) Aesthetic quality
   • B) Ensure proper bonding with binders
   • C) Increase weight
   • D) None of the above

   Hint

   Think about why we need aggregates to interact with other materials.

4. 4.

   True or False: Cleanliness of aggregates does not affect durability.

   • True
   • False

   Hint

   Consider what debris does to the bonding process.

5. 5.

   Evaluate a scenario where aggregates contain high amounts of clay. Predict potential impacts on pavement performance and suggest solutions.

   Hint

   Think about the chemical interactions and bonding nature.

6. 6.

   Propose a standardized method to assess cleanliness across multiple aggregate sources and justify your approach.

   Hint

   Consider how uniformity can be maintained in testing methodologies.