4.1. Considerations During Placing

Try these first

1. 1.

   What is segregation in concrete placing?

   Hint

   Think about what happens when concrete components don't mix well.

2. 2.

   Why should concrete not be poured from a height greater than 1.5 meters?

   Hint

   Consider how gravity affects the mix.

3. 3.

   What is one of the main considerations during the placing of concrete?

   • Allowing layers to set before placing next
   • Preventing segregation
   • Pouring from any height

   Hint

   Think about how different mixtures interact.

4. 4.

   True or False: Cold joints are beneficial in concrete construction.

   • True
   • False

   Hint

   Consider what 'cold' implies about the joint strength.

5. 5.

   You have to pour concrete for a multi-layered foundation. What strategies will you adopt to ensure segregation does not occur?

   Hint

   Consider the characteristics of your concrete mix.

6. 6.

   During a project, you realize your team is allowing too much time between layers. What steps can you take to address this?

   Hint

   Think about the bond strength between layers.