Question

Concrete will continue to strengthen with age over time as long as the relative humidity of concrete remains above ________?

1) 75
2) 80
3) 90
4) 95

Answer 1

For concrete to continue strengthening over time, it's essential to maintain a relative humidity above 80%.

Step-by-step explanation:

Concrete will continue to strengthen with age over time as long as the relative humidity of concrete remains above a certain level. This required level of humidity to ensure continued curing and thus strength increase is typically relative humidity above 80%.