1.5. Prevention Methods

Try these first

1. 1.

   What is segregation in concrete?

   Hint

   Think about different sizes and weights of materials in the mix.

2. 2.

   Name one method to prevent bleeding.

   Hint

   Consider the quality of cement used.

3. 3.

   What is one common cause of concrete segregation?

   • Well-graded aggregates
   • Excessive vibration
   • Correct water-cement ratio

   Hint

   Think about how forces can impact particle arrangement.

4. 4.

   True or False: Re-tempering is encouraged to maintain concrete consistency.

   • True
   • False

   Hint

   Consider why maintaining hydration is crucial.

5. 5.

   How would you design a concrete mix to prevent both segregation and bleeding for a hot weather project?

   Hint

   Think about balance—both in proportions and conditions.

6. 6.

   Given a scenario where you've added excess water to concrete during mixing, outline steps to mitigate the risks of slump loss.

   Hint

   Consider the time-sensitive nature of working with fresh concrete.