11.5.4. Carbonation Depth Test

Try these first

1. 1.

   What does carbonation in concrete mean?

   Hint

   Think about what happens when CO₂ interacts with concrete.

2. 2.

   What is phenolphthalein used for?

   Hint

   Recall its role in the context of measuring carbonation.

3. 3.

   What does a color change from phenolphthalein indicate?

   • High pH
   • low carbonation
   • Low pH
   • high carbonation
   • No reaction

   Hint

   Think of the coloration's meaning.

4. 4.

   True or False: Carbonation can lead to the corrosion of embedded steel.

   • True
   • False

   Hint

   Recall the relationship between pH and corrosion.

5. 5.

   Design a maintenance strategy for a structure showing severe carbonation based on test results.

   Hint

   Think about both immediate repairs and long-term strategies.

6. 6.

   Evaluate the implications of frequent carbonation depth testing on the maintenance schedule of a bridge.

   Hint

   Focus on proactive maintenance and safety benefits.