4.2.3. Troweling

Try these first

1. 1.

   What is the primary function of a surface vibrator?

   Hint

   Think about how vibrations help in making concrete denser.

2. 2.

   Name the first step in the concrete finishing process.

   Hint

   It's the first operation that levels the concrete.

3. 3.

   Which type of vibrator is primarily used where internal access is limited?

   • Surface Vibrators
   • Internal Vibrators
   • Form Vibrators

   Hint

   Think about working conditions for each type.

4. 4.

   True or False: Troweling should be done before the final set of concrete.

   • True
   • False

   Hint

   Consider why timing is critical in finishing.

5. 5.

   A construction site is using both surface and internal vibrators for a concrete slab. The slab is 200 mm thick. Identify potential issues that may arise, and recommend appropriate solutions.

   Hint

   Consider thickness limitations of vibrators.

6. 6.

   During troweling, the equipment operator notices that the blade angle exceeds 1 inch above the concrete surface. What outcomes could occur, and how can this be corrected?

   Hint

   Think about how pressure affects concrete integrity.