9. Effects on Hardened Concrete and Long-term Durability

Try these first

1. 1.

   What is segregation in concrete?

   Hint

   Consider what happens when materials separate.

2. 2.

   What is slump loss?

   Hint

   Think about the timing after mixing.

3. 3.

   What is segregation?

   • Separation of concrete materials
   • Mixing of aggregates
   • Water loss during curing

   Hint

   Focus on what non-homogeneous concrete means.

4. 4.

   True or False: Bleeding results in stronger surfaces.

   • True
   • False

   Hint

   Consider the effects of water accumulation on strength.

5. 5.

   Discuss a scenario where improper handling of fresh concrete leads to major structural failures. Illustrate with specific issues like segregation or bleeding.

   Hint

   Reflect on real-world failures due to these problems.

6. 6.

   Propose a detailed mixing plan to minimize slump loss in a hot weather condition construction site.

   Hint

   Consider how temperature changes affect mixing quality.