11.9. Durability in Special Environments

Try these first

1. 1.

   What is one challenge faced by concrete in marine environments?

   Hint

   Think about exposure to salt water.

2. 2.

   What is air entrainment used for?

   Hint

   Consider cold weather conditions.

3. 3.

   What is an effective solution to combat corrosion in marine environments?

   • Use of high-alumina cement
   • Increased cover thickness
   • Using regular concrete

   Hint

   Consider how to shield steel.

4. 4.

   True or False: Air-entrained concrete is beneficial only in cold environments.

   • True
   • False

   Hint

   Think beyond just one condition.

5. 5.

   Design a concrete mix suitable for a coastal structure. Consider both material specifications and environmental factors.

   Hint

   Incorporate knowledge of marine exposure.

6. 6.

   Evaluate the long-term impacts of freeze-thaw cycles on concrete placed in a northern climate. Propose a solution.

   Hint

   Relate it to water and temperature changes.