4.5. Alternatives to Re-tempering

Try these first

1. 1.

   What is re-tempering?

   Hint

   Think about what happens to concrete when it starts to set.

2. 2.

   Name one alternative to re-tempering.

   Hint

   Consider what additives can help keep concrete workable.

3. 3.

   What is re-tempering?

   • Adding more aggregates
   • Adding water to regain workability
   • Mixing cement with other materials

   Hint

   Focus on the workability aspect of concrete.

4. 4.

   True or False: Using slump-retaining admixtures can help maintain workability without excess water.

   • True
   • False

   Hint

   Think about how chemicals can influence concrete properties.

5. 5.

   You have a construction project where delivery delays might occur. Outline a strategy to avoid having to re-temper the concrete once it arrives.

   Hint

   Focus on logistics and the timing of your concrete delivery and usage.

6. 6.

   Devise a report explaining why using admixtures is preferred over re-tempering, incorporating examples based on the effects on strength and durability.

   Hint

   Consider specific case studies of projects that experienced issues due to re-tempering.