Yes it can. It actually cures harder under water then above it.
True.
what is the purpose of reinforcing bars in a spread footing
no, not normally. It will cure more slowly and how much slower depends on how much dirt is piled on it.
all things that need to dry are based on 72 degrees concrete needs 30 days to fully cure.
Concrete never fully cures, but a non-quicksetting concrete should be firm on the surface in about 4-8 hours, and usable for foot traffic or post setting in 36 hours.
Not much you can do if the concrete is already hard, but if you are talking about plastic concrete (still in its wet state), there's lots you can do to hurt/weaken it:If you had the wrong chemical admixturesAny addition of water at the job site will weaken the concreteFailture to properly cure the concrete
A concrete driveway typically takes about 28 days to cure completely.
28 days is the usual cure time for structural concrete. For street pavements and driveways made with 6-Sack concrete, 3 days of cure will support a car, but 7 to 10 days is required for it to support trucks. All concrete continues to cure forever, as long as moisture is present.
If you hit it hard enough.
It typically takes about 24 to 48 hours for 6 inches of concrete to cure completely.
It typically takes about 28 days for 4 inches of concrete to fully cure and reach its maximum strength.
Concrete should cure for at least 28 days before it can be used for construction purposes.
A cubic yard of concrete weighs the same underwater as it does on land, which is approximately 4,000 to 4,500 pounds. The weight is determined by the density of the concrete mix, not the surrounding environment.
When they invented concrete. Roman concrete set underwater and was used to build harbours.
what is the purpose of reinforcing bars in a spread footing
Yes and many so ask the supplier of your concrete.
The best method to effectively cure and seal concrete surfaces using a concrete sealer is to first clean the surface thoroughly, apply the sealer evenly with a brush or roller, and allow it to dry completely before using the surface. This will help protect the concrete from damage and extend its lifespan.
Concrete typically needs to cure for at least 28 days to achieve maximum strength and durability. During this time, the concrete undergoes a chemical process called hydration, which strengthens the material and improves its durability.