7.8.B. Batching and Mixing

Try these first

1. 1.

   What is the typical water-cement ratio for High Performance Concrete?

   Hint

   Consider the properties of High Performance Concrete.

2. 2.

   Name one advantage of using automated batching systems.

   Hint

   Think about the importance of accuracy.

3. 3.

   What is the typical water-cement ratio for HPC?

   • 0.15-0.20
   • 0.25-0.35
   • 0.40-0.50

   Hint

   Recall the specific properties that HPC aims for.

4. 4.

   True or False: The order of materials added during mixing does not affect the quality of concrete.

   • True
   • False

   Hint

   Think about the effects of mixing on ingredient compatibility.

5. 5.

   Assume you have a defective batching system that consistently under-measures your main ingredient. Discuss the possible impacts on the structural integrity of the resulting concrete.

   Hint

   Consider the consequences of insufficient bonding between materials.

6. 6.

   Propose a detailed sequence of operations for batching and mixing HPC that would ensure quality and consistency. Include at least two quality control measures.

   Hint

   Think about what steps ensure high standards in construction.