3.2. Advantages of Pre-stressing

Try these first

1. 1.

   What is pre-stressing?

   Hint

   Think about how we make concrete stronger!

2. 2.

   Name the two methods of pre-stressing.

   Hint

   One happens before casting, the other after.

3. 3.

   What advantage does pre-stressing offer to concrete piles?

   • Increased moisture content
   • Enhanced load-bearing capacity
   • Higher costs

   Hint

   Remember how we discussed internal stresses!

4. 4.

   True or False: Pre-tensioning is done after the concrete has cured.

   • True
   • False

   Hint

   Think about the order of processes!

5. 5.

   Given a project requiring piles greater than 30 meters, which type of pre-stressing method would you recommend? Justify your choice based on project conditions.

   Hint

   Consider the flexibility needed in construction.

6. 6.

   Calculate the additional reinforcement needed for a pre-stressed pile if it weighs 2 tons and was identified to require double reinforcement due to environmental factors.

   Hint

   Reflect on what 'double' means in terms of reinforcement.