5.2.1.1. Size and Shape

Try these first

1. 1.

   What are fine aggregates?

   Hint

   Think about sand or small stones.

2. 2.

   Why are angular aggregates preferred in high-strength concrete?

   Hint

   Think about how puzzle pieces fit together.

3. 3.

   What shape of aggregate typically offers better interlocking?

   • Rounded
   • Flaky
   • Angular

   Hint

   Think about the edges of the shapes.

4. 4.

   True or False: Using more fine aggregates always leads to higher strength in concrete.

   • True
   • False

   Hint

   Consider how different sizes work together.

5. 5.

   You are tasked to design a concrete mix for a highway. Discuss how you would choose the aggregate sizes and shapes to ensure durability and long-term performance.

   Hint

   Consider the external forces and environmental conditions.

6. 6.

   Evaluate the potential risks of using a high proportion of flaky aggregates in bridge construction and provide recommendations to mitigate these risks.

   Hint

   Focus on the long-term implications for structure stability and safety.