13.1. Coastal Bridge (Chloride Attack)

Try these first

1. 1.

   What is chloride attack?

   Hint

   Think about what happens when saltwater meets concrete.

2. 2.

   What is measured by ASTM C1202?

   Hint

   Consider how we quantify how easily water or salts move through concrete.

3. 3.

   What is the main cause of chloride attack in coastal bridges?

   • Poor design
   • High-quality concrete
   • Excessive cover depth

   Hint

   Consider how strong the barriers are between salt and steel.

4. 4.

   True or False: ASTM C1202 measures the charge passed to determine the chloride permeability risk.

   • True
   • False

   Hint

   Recall how we discussed measuring concrete properties.

5. 5.

   Given a concrete sample with a permeability of 6000 Coulombs, what risk does it pose for a coastal bridge, and what measures could prevent corrosion?

   Hint

   Consider historical examples of corrosion in coastal structures.

6. 6.

   Evaluate the role of admixtures in prolonging the lifespan of coastal infrastructure against chloride attack. Provide specific examples.

   Hint

   Think about how different ingredients alter the outcome in cooking.