15.1. Visual Inspection

Try these first

1. 1.

   What does visual inspection involve?

   Hint

   Think about what you look for during inspection.

2. 2.

   What is the purpose of the slump test?

   Hint

   Consider what happens to the concrete when it's left alone.

3. 3.

   What is the purpose of visual inspection in fresh concrete?

   • To ensure consistency and prevent defects
   • To increase workability
   • To enhance strength

   Hint

   Think about why we assess concrete once it is mixed.

4. 4.

   True or False: Bleeding is when water rises to the surface of freshly placed concrete.

   • True
   • False

   Hint

   Recall the definition of bleeding in concrete.

5. 5.

   A contractor fails to perform a visual inspection before pouring concrete. What potential issues might arise, and how would you address them?

   Hint

   Think about previous discussions on the signs of poor quality concrete.

6. 6.

   Calculate the required number of samples if you are working on a project with an expected total volume of concrete of 50 m3.

   Hint

   Divide the total volume by the sampling rate.