4.2. Consistency and Its Effect on Consolidation

Try these first

1. 1.

   What is the purpose of the lubricating process in concrete pumping?

   Hint

   Think about what happens before the pumping starts.

2. 2.

   Why is immediate cleaning after pumping necessary?

   Hint

   Consider the consequences of not cleaning.

3. 3.

   What is the lubrication process for concrete pumping?

   • Flushing with water only
   • Flushing with mortar grout
   • Using air pressure

   Hint

   Remember what is necessary to ensure smooth pumping.

4. 4.

   Immediate cleaning of concrete pumps is necessary after pumping.

   • True
   • False

   Hint

   Consider the challenges of hardened concrete.

5. 5.

   A concrete company is faced with continuous blockages during their pumping process. They decide to analyze their aggregate size. What aggregate sizes should they consider to minimize these issues?

   Hint

   Think about the minimum size guidelines for pumping.

6. 6.

   Discuss the impact of inadequate lubrication on the pumping process. What specific issues can arise, and how can they be mitigated?

   Hint

   Consider what happens without enough 'slip' in a system.