12. Case Studies of Concrete Durability Failures

Try these first

1. 1.

   What is a water-cement ratio?

   Hint

   Consider how the ratio affects strength.

2. 2.

   Why is curing important?

   Hint

   Think about what happens if concrete is too dry.

3. 3.

   What was a major cause of premature corrosion in the marine bridge pilings?

   • Low concrete cover
   • High temperature
   • Use of regular cement

   Hint

   Think about protective measures.

4. 4.

   True or False: Adequate curing is not necessary for concrete durability.

   • True
   • False

   Hint

   Consider the hydration process.

5. 5.

   A new marine bridge is being constructed. Design a protocol for ensuring adequate cover and the correct water-cement ratio to prevent corrosion.

   Hint

   Focus on environmental exposure.

6. 6.

   During a site inspection, you find evidence of surface dusting on a slab. Propose a corrective action plan.

   Hint

   Consider effects of moisture during finishing.