3.1. Definition

Try these first

1. 1.

   Define segregation in fresh concrete.

   Hint

   Consider how particle size affects concrete.

2. 2.

   What causes bleeding in fresh concrete?

   Hint

   Think about what happens when the concrete mixes.

3. 3.

   What is segregation in concrete?

   • Separation of components
   • Increased workability
   • Water rising to surface

   Hint

   Focus on the component arrangement.

4. 4.

   True or False: Slump loss occurs when water evaporates from the mixture.

   • True
   • False

   Hint

   Consider the factors affecting concrete's workability.

5. 5.

   Given a scenario with high temperatures and extensive delays, describe how each issue (bleeding, slump loss, and re-tempering) would affect the fresh concrete behavior and the final structure.

   Hint

   Think about how each factor interconnects.

6. 6.

   Evaluate the effectiveness of various control measures for preventing segregation during concrete placement. Consider material selection and mixing techniques.

   Hint

   Connect this to the mixing and handling processes.