5.2.3.1. Thermal Expansion

Try these first

1. 1.

   What is thermal expansion?

   Hint

   Think about how materials react to heat.

2. 2.

   Why is compatibility important in aggregate selection?

   Hint

   What happens to materials that expand differently?

3. 3.

   What is the main reason for ensuring compatibility in thermal expansion between aggregates and cement paste?

   • To save costs
   • To prevent cracking
   • To enhance color

   Hint

   Why might different expansion rates cause an issue?

4. 4.

   T/F: The only consequence of mismatched thermal expansion is visible cracking.

   • True
   • False

   Hint

   Consider broader impacts on structural integrity.

5. 5.

   Design a concrete mix for a structure located in an area with wide temperature fluctuations. Explain your reasoning regarding aggregate selection based on thermal expansion.

   Hint

   What should you consider regarding temperature differences?

6. 6.

   A highway bridge uses aggregates with significantly higher thermal expansion than the cement used. Predict the long-term effects of this on the structure.

   Hint

   Think about how materials react differently during temperature changes.