Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Engn. Analyis 2a

Lime and Cement 2

QuestionAnswer
Calcination? Limestone(CaCo3)+Heat = Calcium oxide (Cao) +CO2.However Cao (Quicklime) is Unstable in the presence of moisture and CO2. A more stable form of lime is calcium hydroxide.
Reaction of Slaked Lime? Cao+H20 = Ca(OH)2 +Heat.
How was Cement originally made? By adding crushed volcanic ash to lime,
What is Sintering? Heating the cement at a high enough temperature so that a small proportion of the material melts but the bulk of it remains solid. and it produces a material called clinker.
How is Portland Cement made? Portland cement is made by heating suitable raw materials, typically a mixture of finely ground limestone and clay at a temp. of about 1450c to produce a dark grey nodular material called clinker.
Highlight the main components of a cement works. Quarry (raw materials) = Crushers and mills = Silos for raw material blending = Kiln = Clinker store = Cement Mill.
Name the typical rock types used in cement production? Limestone (supplies the bulk of the materials). Clay, marl or shale (supplies the bulk of the silica, alumina and ferric oxide). supplementary materials such as, fly ash or ironstone to achieve the desired bulk composition.
What is Marl? Marl or Marlstone is a Calcium Carbonate which contains variable amounts of clays.
What is Shale? Shale is a sedimentary rock that was once deposited as mud (clay and silt) and is genrally a combination of clay, silica carbonate and organic materials. it may also have thin beds of sandstone or limestone.
What is Ironstone? Iron-stone is a fine-grained, heavy and compact sedimentary rock.
Explain the Cement making process! Raw materials from excavation site, are deposited in a crusher and are turned into rough ground limestone. they are then passed unto another secondary crusher and turned into fine ground limestone.
Explain the Cement making process Contd? the finely grounded lilmestone is then sent to the proportioning equipment where sand and clay are added. this mix is then sent to the grinding mill which grinds all the supplements and limestone together and then sends the mix to a preheater tower.
Explain the Cement making process Contd 3 ? In the preheater tower, the clay, sand, and limestone are heated up and then sent to the Kiln, where clinkering occurs and clinker is produced.it is then mmoved to a clinker cooler
Created by: frantost
Popular Engineering sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards