Concrete Placement Procedures: What You Need to Know

What are the crucial procedures during the preparation for concrete placement?

1 - Concrete should be retempered or remixed as needed

2 - Concrete shall have the proper consistency

3 - Concrete shall not be hot

4 - Concrete shall have the correct slump

Answer:

The procedure that does not apply during the preparation for concrete placement is retempering or remixing.

All of the listed procedures apply to the preparation of concrete, except for the retempering or remixing of concrete. Rete mpering refers to the practice of adding water and mixing it into the concrete again to make it more workable. However, this is not usually recommended because it can significantly weaken the concrete. If the concrete is not workable enough, the mix design should be adjusted appropriately. Ensuring that the concrete has the correct consistency, or slump, is a crucial part of the process. Slump represents the flow and workability of the concrete. Too much slump and the concrete is too wet and may lose strength and durability, too little and it may not be workable. Concrete temperature is also important. If the concrete is too hot, it can lead to what is known as hot weather concreting problems, which can cause the concrete to dry out too quickly, affecting its curing. It’s advised to keep concrete temperature below 77 degrees Fahrenheit during placement to avoid such issues.

By following these procedures carefully, you can ensure that the concrete placement process goes smoothly and that the end result is a strong and durable structure.