6.1. Spacing and Insertion Guidelines

Try these first

1. 1.

   What is the primary purpose of lubrication in concrete pumping?

   Hint

   Think about why we apply lubricants in machines.

2. 2.

   Why is cleaning necessary after pumping concrete?

   Hint

   Consider what happens if concrete sits too long in the equipment.

3. 3.

   What is the role of lubrication in concrete pumping?

   • To thicken the concrete
   • To facilitate flow through pipes
   • To cool down the pump

   Hint

   Think about the purpose of adding lubricants.

4. 4.

   True or False: The larger the size of aggregate, the easier it is to pump concrete.

   • True
   • False

   Hint

   Consider the effect of size on movement through a narrow opening.

5. 5.

   Analyze the impact of using too large an aggregate on the efficiency of concrete pumping. What might happen during the process?

   Hint

   Consider how clogs affect flow in other systems you know.

6. 6.

   Evaluate different methods of cleaning out concrete pumps and pipelines after a long job. Which method would you recommend and why?

   Hint

   Think about which is easiest and least damaging to the equipment.