6. Testing of Fresh Concrete Properties

Try these first

1. 1.

   What does segregation in concrete refer to?

   Hint

   Think about how different-sized materials behave.

2. 2.

   What is bleeding in concrete?

   Hint

   Consider what happens to water in a saturated mix.

3. 3.

   What is the primary cause of bleeding in fresh concrete?

   • Low water-cement ratio
   • High water-cement ratio
   • Well-graded aggregates

   Hint

   Think about how water influences the mix.

4. 4.

   True or False: Re-tempering can strengthen the concrete.

   • True
   • False

   Hint

   Consider what happens when you add water to a setting mix.

5. 5.

   Discuss a scenario where improper handling leads to the effects of segregation on a concrete project. What measures would you suggest to prevent it?

   Hint

   Think about the strategies that can maintain the uniformity of the mix.

6. 6.

   Given a construction site with high temperatures, outline a plan to maintain concrete workability and prevent slump loss.

   Hint

   Consider all factors influencing temperature during concrete work.