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Concrete has Portland cement in it. Portland cement is finely ground limestone that is baked until there is no water in it at all.
After concrete is poured, the water in it starts chemically combining with the Portland cement, slowly turning it back into limestone . . . sort of. After 3 days, the concrete is hard enough to use . . . walking on or driving on with a light car, but it takes 28 days for concrete to harden to its full rated strength so it is usable in building, bridges, and so on.
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Why cement can set hard?
Thw AIR set the cement hard I found this out on my text book LOL
What is a good sentence for cement?
the strong apartment building was made of hard cement
What happens if you eat hard cement?
yes it goes extremely hard
Does roofing cement dry hard and how long does it take to dry?
how long does roof cement to dry
What can you take to get hard before you see your girlfriend?
Cement
What would life be like if you didn't have cement?
Life without cement will be hard because nothing will be made.also because cement holds things together if something is made it will calmphs
Can you mix cement in the hole you dug?
Yes, but the walls of the hole may contaminate the cement. Mixing the cement may be very hard, and precarious. Further, you may not be able to remove all the cement from the hold afterwards. It is more advisable to use a cement-mixer.
Why cement became hard when it came in contact of water?
because water falls on it
What are houses made from in India?
mostly metal and hard rock and cement
20 example of soft and hard words?
cement century central cereal
How cement get hard?
Cement hardens through a chemical process called hydration, where water reacts with the compounds in the cement to form crystals. This process creates a strong and durable bond between the cement particles, resulting in a solid and hardened structure. Factors such as water-to-cement ratio, temperature, and curing time can affect the strength and durability of the hardened cement.
How does concrete go hard?
When the elements in concrete mix thouroughly and some liquids evaporate, cement goes hard becoming concrete.
