18.8. Quality Control and Testing of Designed Mix

Try these first

1. 1.

   What does the slump test measure?

   Hint

   Think about how the concrete will behave before it sets.

2. 2.

   What is the primary purpose of testing hardened concrete?

   Hint

   Consider what we look for in a finished structural element.

3. 3.

   What does a slump test primarily assess?

   • Durability
   • Workability
   • Strength

   Hint

   Focus on what happens to the concrete before curing.

4. 4.

   True or False: The water permeability test is conducted on fresh concrete.

   • True
   • False

   Hint

   Consider the state of the concrete when each test is conducted.

5. 5.

   Your concrete mix fails the slump test, indicating low workability. What specific actions can you take before pouring the mix?

   Hint

   Think about what adjustments would allow you to maintain the balance of strength and workability.

6. 6.

   A batch of hardened concrete shows high permeability results. How would you modify the mix design to enhance durability?

   Hint

   Focus on minimizing pathways for moisture ingress to improve longevity.