13. Pumping of Fresh Concrete

Try these first

1. 1.

   What is the primary function of pumping concrete?

   Hint

   Think about how concrete is moved on a construction site.

2. 2.

   Define cohesiveness in the context of concrete.

   Hint

   What helps concrete maintain its structure during transport?

3. 3.

   What is the main requirement for concrete to be pumpable?

   • High cohesiveness
   • Low water-cement ratio
   • Large aggregate size

   Hint

   Think about what keeps the mix from separating during transport.

4. 4.

   True or False: Angular aggregates improve pumpability.

   • True
   • False

   Hint

   Consider how the shape of aggregates can affect fluid flow.

5. 5.

   Given a concrete mix design with a low water-cement ratio and angular aggregates, what troubleshooting steps would you take to ensure successful pumping?

   Hint

   How can you adjust the mix to improve pumpability?

6. 6.

   Analyze the effects of pipeline layout on the success of pumping concrete and propose solutions for minimizing resistance in a typically curved setup.

   Hint

   What layout might help reduce obstacles during pumping?