6.2. Maintenance and Cleaning

Try these first

1. 1.

   What is a free fall mixer?

   Hint

   Think about how things fall due to gravity.

2. 2.

   Name one type of power mixer.

   Hint

   Consider the shapes they might resemble.

3. 3.

   Which type of mixer uses gravity for operation?

   • Power Mixer
   • Free Fall Mixer
   • Planetary Mixer

   Hint

   Think about how gravity affects mixing.

4. 4.

   True or False: Mixing for too long can lead to an undesired effect on concrete.

   • True
   • False

   Hint

   What happens if you keep mixing beyond the recommended time?

5. 5.

   A contractor uses a free fall mixer to mix 10 cubic meters of concrete but notices that 30% sticks to the sides of the drum. How can they prevent this in future batches?

   Hint

   Think about the features that mitigate sticking.

6. 6.

   A power mixer has a nominal capacity of 15m3 but operates at 80% efficiency. Calculate the actual concrete production per hour if the cycle time is 4 minutes.

   Hint

   Focus on workload capacity and operational efficiency.