3.4. Recommended Aggregate Size

Try these first

1. 1.

   Why is lubrication important before pumping?

   Hint

   Think about what could happen without lubrication.

2. 2.

   What is the maximum size of aggregate recommended?

   Hint

   Recall the guidelines for pumping efficiency.

3. 3.

   What should be done before pumping concrete?

   • Flushing with water
   • Lubrication with mortar grout
   • Pouring without preparation

   Hint

   Consider what helps in smooth operation.

4. 4.

   True or False: Aluminium pipes are ideal for concrete pumping.

   • True
   • False

   Hint

   Recall the materials that should be avoided.

5. 5.

   A construction project uses 35mm aggregates for pumping. Analyze the potential problems arising.

   Hint

   Think about how materials interact inside the pump.

6. 6.

   Explain the protocols needed for using lightweight aggregates in terms of preconditioning before pumping.

   Hint

   Consider how varying materials require different handling!