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Concrete hardens under water through a process called hydration, where the water in the mix reacts with cement particles, forming chemical bonds that create a solid structure. This process can occur even when submerged, as long as there is sufficient water available for the reaction. The hydration continues over time, allowing the concrete to gain strength and durability, regardless of the surrounding environment. Properly mixed and placed, underwater concrete can achieve similar or even superior performance compared to concrete cured in dry conditions.
What else can I help you with?
Does the amount of water in a gravel based concrete depends on how fast it will harden?
yes, because after casting, concrete will get its 90% strength within 28 days and proper hydration require the proper amount of water for atleast 28 days.
Why is water added to concrete while mixing it?
Concrete is made from cement and added gravel. Cement starts out as a powdered rock, which will remain a powder unless water is added to it. Water turns it unto a paste which will gradually harden into a solid material. The water undergoes a chemical reaction with the cement powder.
Will cement harden in the cement truck if it is not rotating?
Actually, the rotation is mainly to keep the concrete well mixed and homogeneous during transport, thereby insuring the sand, gravel, water, and cement is well mixed. The concrete itself will set up or harden at approximately the same rate of time, regardless, whether it is rotating or not. Typical concrete mixes show noticeable hardening/stiffening after approx 2 hours, depending on temperature and other factors.**Note: The correct term is concrete. Cement is actually the dry gray powder, that when hydrated with water, bonds the rock and sand together to make concrete.
Why does concrete harden?
A chemical reaction which is called hydration between the cement & water (also called 'curing') and which takes TIME mostly, it can still be hardening a hundred years later!
What is needed to make concrete?
To make concrete, you need three primary ingredients: cement, water, and aggregates (which include sand and gravel or crushed stone). The cement acts as a binder that holds the aggregates together when mixed with water. The water activates the cement's chemical reactions, allowing it to harden and gain strength. Proper mixing and curing are also essential to ensure the concrete achieves its desired properties.
What causes concrete to harden?
Chemical reaction of lime and dehydrated gypsum with water.
Can you eat concrete?
if you smother it in kethcup you can eat anything Actually no you cannot eat concrete. Well you should not eat concrete, the body is primarily made up of water. What is needed for concrete to harden? Water. Think about it, it would harden in your lower intestine and you would have some hard crap. Literally. Not a good idea.
Can you dry pour concrete without adding water?
No, you cannot dry pour concrete without adding water. Water is necessary to activate the chemical reaction that causes the concrete to harden and set properly.
What are the constituents of concrete?
Concrete is composed of water, cement and sand. It has three constituents. Concrete is mixed as a wet mixture, poured into place and allowed to harden and dry.
How does mixing concrete and allowing it to harden is similar to formation of sedimentary rock?
Both processes include sediments and water, with the water facilitating the setting of the material. However, sedimentary rock tends to form under pressure, whereas the hardening of concrete just requires it to dry out.
Are concrete bricks fired?
No, concrete bricks are not fired. Unlike clay bricks, which are baked in a kiln to harden, concrete bricks are made from a mixture of cement, water, and aggregates, and they harden through a curing process. This process involves allowing the concrete to set and gain strength over time, usually in a controlled environment.
Is concrete a compound after the water evaporates and it hardens?
Concrete is not a compound after water evaporates and it hardens. Concrete is a mixture of aggregate materials (such as sand and gravel) and cement, which binds the materials together. When water is added to the mixture, a chemical reaction occurs with the cement that causes it to harden and bind the aggregate materials together.
What material is very durable artificial rock?
No. Cement is used to hold the rocks of concrete together. Cement by itself does harden in water. but it not a very hard or durable product.
Can you plant a seed in concrete?
You can but it will not grow. it will if theres water under the concrete
How to make concrete from scratch?
To make concrete from scratch, mix cement, sand, and gravel in specific proportions with water. The mixture should be thoroughly combined and poured into molds to set and harden.
Functions of water in concrate mixing?
Water in concrete mixing plays several important roles: It hydrates the cement, which allows the concrete to harden and set. It helps to lubricate and facilitate the mixing process. Water also affects the workability and flowability of the concrete, allowing it to be poured and compacted easily. Adjusting the water content can also impact the strength and durability of the final concrete.
How couldi design an under ground concrete water tank?
pleas i want to know the proccedure of deisign of under ground concrete water tank
