Under water, concrete will set just fine. It is preferable to use a sleeve to deposit the concrete in the bottom of the hole first, then displace the water, rather than simply pouring it in, though that will also work. Rather than just pouring it in, but it will still work. Your words are powerful. Concrete can be poured into almost any shape, although some forms are better suited for certain shapes. A form is an accessory used while pouring concrete to help create a desired shape. There are several different types of forms: free-form (no template), half-form (for shaping half of a wall), and complete form (for shaping the entire surface).
You can pour concrete into a hole filled with water, as long as the weight of the concrete doesn't cause the water to rise up higher than the top of the hole. If this does happen, either dig out the area below the rising water line or add more concrete to fill the gap. Either way, make sure the water can drain through the new concrete surface.
Pouring concrete floors is similar to pouring other types of floors, except that there are additional considerations related to the depth of the floor being poured. Not only does the height of the concrete matter, but so does its depth. Deeply buried cables, pipes, and wires can't be seen until they're exposed by something like shifting soil levels, after which time they may need to be replaced.
Overwatering concrete can result in decreased strength, decreased durability, shrinkage cracking, and a number of surface issues. There is no such thing as too much water in concrete that will cause it to fail to set. If there is too much water, it may not mix well or flow out of the form/hole/whatever. Sometimes, more than one batch of concrete is used to ensure enough water is present for proper mixing and setting.
If you are wondering if adding more water will make your concrete set faster, the answer is yes! Concrete sets when water evaporates from its surface. The more water there is under the surface, the faster it will set. Adding more water means more evaporation opportunities so the set will be faster.
However, this also means that if you add too much water, you will end up with a concrete slab that is too soft. Soft concrete does not retain heat very well and is very vulnerable to freezing and thawing. This will cause it to crack and show signs of damage that might not be apparent until after it has been installed in your project.
Concrete should be watered adequately but not over-watered. A good rule of thumb is to keep the water below the grade where it will not drain away from other areas of your yard or garden. If you have a pool, do not water it any more often than necessary to maintain its pH level.
Allow the concrete to set as slowly as possible as well. Increasing the cure time by reducing the evaporation of water results in stronger concrete. Once the pour has firmed up, gently wet it down with cool water and cover it with plastic wrap. Let it dry out completely before exposing it to the air.
White cement is a mixture of limestone powder and clay that has had most of the gray color removed. This makes it suitable for use where color is important such as in building projects or when painting concrete surfaces. Limestone is a natural substance composed of calcium carbonate that is used as a pigment and additive for concrete. It increases the density and durability of the final product while improving its aesthetic appeal. Cement that is not refined enough to be clear is called "clinker-based". This type of cement can stain some fabrics if it comes into contact with them. Concrete that has not been cleaned properly after it has hardened contains all sorts of other materials including metals that should not be ingested.
Limestone powder has a very low density (1.5 g/cm3) so it will float on top of the liquid part of the cement mix. This means that any particles that are larger than 0.15 mm (6 inches) may end up in your finished product. This is not harmful but it does reduce the overall strength of the concrete.
Concrete is a porous substance by definition, and water can travel through it by hydrostatic pressure, water vapor gradient, or capillary action. Water can also enter through cracks, structural flaws, or joints that are inadequately built or placed. As long as the water that enters the concrete is not saturated, it will not remain static and will eventually drain out.
If the water that enters the concrete is saturated, it will remain static until it evaporates or is removed by another method. Saturated water that does not escape remains in the concrete and may cause corrosion of any metal inserted into the mix-pour hole (if present). Corrosion from saturated concrete can be reduced by adding chloride to the mix. The higher the percentage of clinker in the concrete, the less likely it is to corrode. Clinker is the name given to the hard granules found in cement that provide support for the concrete structure.
If the water is saturated, it will remain static until it evaporates or is removed by another method. Concrete that is fully immersed in water will deteriorate over time because oxygen is required for its chemical reaction to produce carbon dioxide, which gives it its strength. Therefore, if you want your concrete to last longer, let it dry out between pours.
If there is a heavy rain and too much groundwater enters into the concrete, it will deteriorate. To avoid this issue, cover the area and attempt to keep the rain as far away from it as possible. The more time that passes after pouring the concrete, the less likely this problem will occur.
Concrete that gets wet should be covered to prevent any moisture from entering the wall cavity. This will prevent mold growth and other problems that may arise due to water damage. If it starts to rain while you are still on site, but before the concrete has had a chance to dry, you will need to cover it immediately to prevent further water damage.
Once the concrete has had some time to dry, you can remove the coverings. You do not need to wash them first; just pull them off easily in one piece.
You should cover freshly poured concrete with at least 1 inch of loose material such as gravel or pumice stone to help maintain its strength and appearance. As long as it is not exposed to rain, sun, or snow, the concrete should remain intact for up to two years.
As mentioned, if water does enter the concrete, it will cause damage. This includes if it occurs during rainfall events that are less than an hour long.