7.2. Methods

Try these first

1. 1.

   What is the purpose of compaction in fresh concrete?

   Hint

   Think about how density affects concrete.

2. 2.

   Name one method of mechanical compaction.

   Hint

   What helps to vibrate the concrete?

3. 3.

   What is the primary purpose of compaction in fresh concrete?

   • Increase density
   • Change color
   • Add water

   Hint

   What does compaction do to the concrete structure?

4. 4.

   True or False: Over-vibrating concrete can improve its density.

   • True
   • False

   Hint

   Consider what can happen to the concrete mix.

5. 5.

   Given a scenario where a construction team used mechanical vibration excessively, describe the consequences on the final concrete structure.

   Hint

   Think about how particles can displace from each other.

6. 6.

   Consider a construction site where only hand compaction is feasible. Discuss how the team can minimize inconsistencies in their process.

   Hint

   How might they check their work?