7.2.3. Aggregates

Try these first

1. 1.

   What is the typical maximum size of aggregates used in HPC?

   Hint

   Think about what size actually fits well together.

2. 2.

   Name one characteristic that aggregates must have for high quality.

   Hint

   Consider what could weaken concrete.

3. 3.

   What is the ideal maximum aggregate size for High Performance Concrete?

   • < 10 mm
   • 10-20 mm
   • > 20 mm

   Hint

   Think about sizes that fit well in gaps.

4. 4.

   True or False: Lower water absorption in aggregates is preferred in High Performance Concrete.

   • True
   • False

   Hint

   Think about what could weaken concrete.

5. 5.

   Analyze a case where a bridge failed due to poor aggregate selection. What key factors related to aggregates contributed to its failure?

   Hint

   Consider how each factor would interact with environmental forces.

6. 6.

   You are tasked with designing aggregates for a high-rise building in a coastal area. Discuss the properties you would prioritize in selecting aggregates for this specific application.

   Hint

   Think about the unique challenges coastal environments present.