22.1. Overview

Try these first

1. 1.

   What is the primary use of aggregates in pavements?

   Hint

   Think about how concrete gets its strength.

2. 2.

   Name two types of aggregates.

   Hint

   Consider where they come from.

3. 3.

   What percentage of Bituminous concrete is made up of aggregates?

   • 70-80%
   • 92-96%
   • 60-70%

   Hint

   Think of their role in providing strength to concrete.

4. 4.

   True or False: Manufactured aggregates come from natural sources.

   • True
   • False

   Hint

   Consider the origin of each type.

5. 5.

   Evaluate a scenario where low-quality aggregates are used in a newly constructed highway. Predict possible outcomes and solutions.

   Hint

   Consider the role of materials in structural integrity.

6. 6.

   Design an experiment to test the water absorption of various aggregates and discuss its implications on concrete performance.

   Hint

   How does water affect the bonding in concrete?