2.3.3. Productivity and Variants

Try these first

1. 1.

   What is a free fall mixer?

   Hint

   Think about how it mixes the ingredients.

2. 2.

   Why is adhering to mixing time guidelines important?

   Hint

   Consider what happens if you mix too little or too much.

3. 3.

   What is the minimum slump required for a free fall mixer?

   • 20mm
   • 50mm
   • 100mm

   Hint

   Recall the specifics of mixer requirements discussed.

4. 4.

   Power mixers are faster than free fall mixers. True or False?

   • True
   • False

   Hint

   Think about the features of a power mixer.

5. 5.

   Given a pan mixer’s total volume is 1500 liters, estimate the maximum batch size if it is filled to two-thirds capacity.

   Hint

   How do you calculate two-thirds of a total volume?

6. 6.

   Discuss the potential consequences of inadequate mixing time on concrete workability and strength.

   Hint

   Think about how insufficient mixing can affect the final concrete properties.