Question

How many days does it take for concrete to reach its minimum design compressive strength?

1) 7 days
2) 14 days
3) 21 days
4) 28 days

Answer 1

The minimum design compressive strength of concrete is typically reached after 28 days of curing.

Step-by-step explanation:

The minimum design compressive strength of concrete is typically reached after a certain number of days of curing. This is known as the 28-day compressive strength. Therefore, the correct answer is option 4) 28 days.