4.2. Chemical Deterioration

Try these first

1. 1.

   What is sulfate attack?

   Hint

   Think about what happens when sulfates interact with calcium compounds.

2. 2.

   Name one effect of carbonation.

   Hint

   Consider how the environment interacts with concrete over time.

3. 3.

   What chemical process involves the formation of ettringite?

   • Chloride Attack
   • Sulfuric Attack
   • Sulfate Attack

   Hint

   Connect it to expansion and cracking in the concrete.

4. 4.

   True or False: Carbonation increases the pH level of concrete.

   • True
   • False

   Hint

   Think about the chemical reactions involved.

5. 5.

   Design a concrete mix for a bridge located in a coastal environment. Consider the effects of chloride and sulfate exposure in your design.

   Hint

   Think about materials that enhance durability.

6. 6.

   Analyze a failure report of a concrete structure affected by carbonation. What improvements would you recommend for future projects?

   Hint

   Focus on preventive measures in design and construction practices.