3.6. Role of Aggregates in Concrete

Try these first

1. 1.

   What percentage of concrete volume is typically comprised of aggregates?

   Hint

   Think about how concrete is primarily made up.

2. 2.

   Name one role of fine aggregates in concrete.

   Hint

   Consider what helps in mixing concrete easily.

3. 3.

   What is the primary role of coarse aggregates in concrete?

   • To provide workability
   • To provide strength
   • To reduce costs

   Hint

   Think about what holds concrete together.

4. 4.

   True or False? Fine aggregates reduce concrete's overall cost.

   • True
   • False

   Hint

   Reflect on different material costs.

5. 5.

   Evaluate the importance of aggregate grading in the context of a bridge construction project. How might poor grading affect safety and durability?

   Hint

   Consider how load-bearing situations require solid foundations.

6. 6.

   Consider a region with extreme heat conditions. Recommend specific types of aggregates that would enhance concrete's thermal resistance and rationalize your choices.

   Hint

   Think about how different materials react under high temperatures.