11.12. Durability Assessment in Existing Structures

Try these first

1. 1.

   What is the purpose of visual inspection in durability assessment?

   Hint

   Think about what engineers look for on the surface.

2. 2.

   What does NDT stand for?

   Hint

   It involves testing methods that don't damage the structure.

3. 3.

   What is the first step in assessing a concrete structure?

   • Core sampling
   • Visual inspection
   • Non-destructive testing

   Hint

   Think about the easiest method to start with.

4. 4.

   True or False: Non-destructive testing methods can result in physical damage to a structure.

   • True
   • False

   Hint

   Consider the name of the method itself.

5. 5.

   A visual inspection reveals extensive surface cracking and spalling on a concrete bridge. Design a plan to assess and address the durability of the structure.

   Hint

   Consider both immediate and long-term measures needed for assessment.

6. 6.

   A structure is showing signs of chloride-induced corrosion. Describe the testing sequence that should be used to evaluate its current state.

   Hint

   Think about how each step informs the next for a thorough assessment.