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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 temperature does concrete need to be to harden?
all things that need to dry are based on 72 degrees concrete needs 30 days to fully cure.
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.
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.
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 couldi design an under ground concrete water tank?
pleas i want to know the proccedure of deisign of under ground concrete water tank
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.
How do you cut up a bag of harden concrete mix?
With a sledgehammer.
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.
How is the combination of water and concrete mix a physical change?
well obviously concrete is soft material then turns hard after a couple of days while water is always wet and i wouldnt say soft but its always water. of course when you put water and concrete together it will harden the same way which is physiscal change, also if you put tomato juice into it as well it will turn red
Water leak problem under the sidewalk, how do I get to it without breaking the concrete?
I have a water leak under slab concrete and it is coming off the walk into my yard. How do I get to it to fix it without breaking the sidewalk?
