0
cement is a calcined mixture of limestone,silica and gypsum that are anhydrated and form a hard structural bond on drying
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What is rubber cement?
Rubber cement is a type of glue that is oten used in gluing paper, because it is not water-based, and therefore does not ruin the paper.Rubber glue is an elastic polymer mixed with a solvent like acetone. When it's applied, the solvent dries out allowing the glue to harden and adhere.
Is hydrated lime concrete?
No it is not. Hydrated lime and concrete are quite different. hydrated lime is an addative similar to cement and used in concrete to improve the strength. it can also be added to soil to improve stability etc. typically concrete is a mixture containing different % of rock, cement/lime, fly ash, water. lime is a cheaper then cement however not aas effective and takes longer to harden. -civil engineering student
How does cement dry up?
When water is added it starts a process beginning with the formation of short hexagonal crystals. it is this process of crystal formation which begins the setting process and usually is substantially complete after 24 hours. However, the crystals continue to form and fill up the spaces for weeks and even months as long as the cement is not allowed to dry out. When mixing cement it is recommended to keep it wet for at least 3 days, when it reaches maybe 80% of its final strength, but a week to ten days is better. Cement will continue to harden for several years. The strongest cement you can get is that which sets up underwater and is never allowed to dry out
What elements make up concrete?
Concrete is probably the most important building material today and is used as an alternative for brick/wood since the Roman & Egyptian times. It is composed of cement,stone[gravel], sand and water which is a key ingredient that hardens the concrete. When reinforced with steel bars it is even more useful.
Does plasticine harden?
no
What is present tense of harden?
"Harden" is the present tense. Ex. I harden the the cement by allowing it to dry. The past tense is hardened. The future tense is will harden.
What is the present tense of harden?
"Harden" is the present tense. Ex. I harden the the cement by allowing it to dry. The past tense is hardened. The future tense is will harden.
Can cement tools be washed off in the kitchen sink and will the cement plug up and harden in the drain?
They should not be cleaned in the kitchen sink and YES, it will harden in the drain.
How do you harden cloth mummy decoration?
place it in cement
What animals eat cement?
I don't think any animals eat cement, but if they did then it would harden inside of them and they would die. Any animal who eats cement is called a cement eater therefore he eats cement and if they eat iit then they will die...... socement eaters are what eat cement
What is meant by binder material in concrete?
The binder in concrete is usually cement. Cement causes the aggregate and sand to bind together mechanically and harden to make a solid surface.
What is Chemical name of cement?
The very basic chemical compound of cement is Calcium Hydroxide. The calcium hydroxide is mixed with water and the carbon dioxide in the air acts on it to harden it.
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.
Is lava most likely to form to high or low viscosity lava?
Low--it's easier for it to harden when it's not flowing. This is also why cement mixers spin to keep the cement from hardening.
What would happen if you ate cement?
The cement would harden inside of you. I don't even know why you would eat cement. It's probably toxic and plus you would be eating liquid rock so it wouldn't taste very good.
Difference between opc and ppc?
Ordinary Portland Cement, also known as OPC, is a type I cement that does not only harden, but also becomes water-resistant once it cures. Pozzolanic Portland Cement, or PPC, is a type IV cement that includes a mixture of a pozzuolanic material, which can increase the strength of the concrete and reduce the amount of OPC used.
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.
