7.1. Case Study 1: Bridge Deck Corrosion due to Chloride Attack

Try these first

1. 1.

   What contributes to chloride attack in concrete?

   Hint

   Think about where chlorides come from.

2. 2.

   What does the water-cement ratio affect?

   Hint

   Recall the mixing ratio.

3. 3.

   What is the main cause of corrosion in the case study?

   • High humidity
   • Corrosion-resistant materials
   • Chloride ingress
   • Low temperatures

   Hint

   Think about the environment where the bridge is located.

4. 4.

   True or False: A low water-cement ratio increases the permeability of concrete.

   • True
   • False

   Hint

   Remember which ratio favors strength.

5. 5.

   Design a bridge deck with optimal waterproofing and concrete cover to prevent chloride attack. Detail the materials and methods you would use.

   Hint

   Consider the environment and materials that enhance durability.

6. 6.

   Evaluate the economic impact of repairing a corroded bridge due to inadequate design. Consider both short-term costs and long-term implications.

   Hint

   Break down the costs into immediate and future expenses.