12. Hardened Concrete – Non-Destructive Tests

Try these first

1. 1.

   What is the main purpose of Non-Destructive Testing?

   Hint

   Think about how testing could affect a structure.

2. 2.

   Name one advantage of the Rebound Hammer Test.

   Hint

   Consider the practical applications in the field.

3. 3.

   What does NDT stand for?

   • Natural Density Test
   • Non-Destructive Testing
   • Nutritional Density Test

   Hint

   What term is commonly used in engineering for safe testing?

4. 4.

   The Rebound Hammer Test provides direct measurements of what?

   • True
   • False

   Hint

   Consider if it measures strength directly.

5. 5.

   You are testing an old concrete structure. The Rebound Hammer gives an average value of 25. What would be your next steps with UPV, and why?

   Hint

   Think about where issues might lie in the structure.

6. 6.

   A core sample shows only 72% compressive strength compared to specified values. What does this indicate about the concrete quality, and what actions should you take?

   Hint

   Consider what percentage might require attention in structural integrity.