5.2.3. Thermal and Chemical Properties

Try these first

1. 1.

   What does thermal expansion refer to?

   Hint

   Think about what happens when things heat up or cool down.

2. 2.

   What is the significance of soundness in aggregates?

   Hint

   Consider extreme weather conditions!

3. 3.

   What is the primary concern with thermal expansion in concrete?

   • Prevents water absorption
   • Leads to cracking if not compatible
   • Enhances durability

   Hint

   Consider how temperature changes affect materials.

4. 4.

   True or False: Chemical stability is not a primary concern for aggregates.

   • True
   • False

   Hint

   Think about what can happen over time.

5. 5.

   Given a set of aggregates with varying thermal expansion coefficients, calculate the potential cracking risk in a concrete mix intended for temperature-intensive environments.

   Hint

   Understand the effects of temperature on materials.

6. 6.

   Propose a method to find alternative aggregates if tests show high reactivity in a chosen aggregate sample.

   Hint

   Research what properties make aggregates less reactive.