Question

What is the purpose for vibrating concrete?

1) To remove trapped air
2) To consolidate the concrete
3) To separate the ingredients
4) Both 1 and 2

Answer 1

Vibrating concrete is done to consolidate the mixture, making it stronger, and to remove trapped air, not to separate its ingredients.

Step-by-step explanation:

The purpose of vibrating concrete is to ensure that it consolidates properly and to remove any trapped air pockets. Consolidating the concrete makes it stronger by ensuring that it is compact without any gaps or weaknesses.

Vibrating helps to accomplish this by causing the concrete mixture to settle into place and fill up any voids, effectively removing trapped air. Vibrating also helps the components of the concrete to bond together more effectively, but it does not aim to separate the ingredients. Therefore, the correct answer is 4) Both 1 and 2.