4.3. Types of Vibrators

Try these first

1. 1.

   What is the purpose of consolidating concrete?

   Hint

   Think about what happens to air bubbles in concrete.

2. 2.

   Define an internal vibrator.

   Hint

   What are its other names?

3. 3.

   What is the primary purpose of using vibrators in concrete?

   • To color the concrete
   • To remove air voids
   • To make it stronger through mixing

   Hint

   Think of the air as a weakness in concrete.

4. 4.

   True or False: Internal vibrators are also known as external vibrators.

   • True
   • False

   Hint

   Consider their placement!

5. 5.

   You have a construction site needing a continuous pour of concrete. Discuss the strategy around choosing and using the right internal vibrator for different sections of the pour.

   Hint

   Think about what changes you might need for congested areas.

6. 6.

   Calculate the radius of influence for a vibrator with a diameter of 40mm and discuss how it affects productivity.

   Hint

   Consider the formula radius as a function of diameter!