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Cement-3

Types of cement
  Beside the ordinary Portland cement or number of other type of cement are also manufactured by varying the ratio of the raw material or by adding some additional materials
  In additional to ordinary cement the following are the other important varieties of cement available in the market
  1. Quick setting cement
  2. Rapid hardening cement
  3. High alumina cement
  4. Blast furnace cement
  5. Low heat cement
  6. White cement
  7. Coloured cement
  8. Sulphate cement
  9. Expanding cement
  10. Pozzolana cement
  11. Hydrophobic cement
  12. Waterproofing cement
  13. Acid resistant cement
  Each of the above variety of cement will now be discussed in brief
Quick setting cement
  It is produced by adding a small percentage of aluminium sulfate and by finally grinding the cement
  It contain very little or no retarding substance like gypsum
  The setting action of the cement starts within a 5 minutes after addition of water and cement becomes hard in less than 30 minute
  This type of cement can be used for construction under water
Cement
Quick setting cement
Rapid hardening cement
  It is also known as high early strength cement
  It is manufactured with search adjustments in proportions of of raw materials so that the cement produced against maximum strength within 2-4 days
  It is used only when time is the most important factor in a project and is used for making very high early strength concrete
Cement
Rapid hardening cement
High alumina cement
  High alumina cement is manufactured by fusion of bauxite and limestone
  This cement is specifically useful against corrosive action of seawater
  It is therefore commonly used for a good quality construction work near and along seashore
Cement
High alumina cement
Blast furnace cement
  For this cement the slag as obtained from blast furnace is used
  This payment has a slow rate of hardening and less heat of hydration
  It is not affected by sea water and is used for Marine structure
Cement
Blast furnace cement
Low heat cement
  It is a type of cement in which very low amount of heat of hydration is is liberated during setting and hardening
  this is the ideal cement of construction of massive concrete structure like dam as it reduce the development of crack in the structure
Cement
Low heat cement
White cement
  White cement is manufactured from China clay and white chalk in place of limestone and clay
  It gives a milky or snow white appearance
  White cement is costly and is used for interior decoration and architectural finish
Cement
White cement
Coloured cement
  For giving colour to the cement pigment oxide of lead are you used
  Coloured cement are extensively used for top court in flooring and four decorative purpose in a various place in a building
Cement
Coloured cement
Sulphate cement 
  This cement manufactured by adding quantities of calcium sulphate and blast furnace slag to the ordinary cement
  This cement is specifically used for massive concrete work in sea water
Cement
Sulphate cement
Expanding cement
  Itis produced by adding and expanding medium like sulphoaluminate and a stamp stabilizing agent to the ordinary cement
  This cement is used for the construction of water retaining structure and also for repairing the damaged concrete surface
  This cement expands whereas other cement string
Cement
Expanding cement
Pozzolana cement
  Pozzolana is a natural or artificial e material containing silica and alumina in a reactive form
  This is a cement of blended mixture of Portland cement and pozzolana
  It is widely used for hydraulic structure such as dams and wire and etc
Cement
Pozzolana cement
Hydrophobic cement
  It contains add mixture with the decrease as wetting ability of cement
  Such cement are specifically useful for application in cold frost forming condition
Cement
Hydrophobic cement
Waterproofing cement
  This cement is produced by mixing some water proofing agent in the cement during its grinding
  Concrete made with this cement is more impermeable and is is more resistance to do chemical attack
Cement
Waterproofing cement
Acid resistant cement
  It has predominant days of high silicates and a high resistance to acid
  It is used for bending and join acid proof break and tails for this lining of acid storage vessels and tanks and for construction of acid resistance industrial flooring
Cement
Acid resistant cement

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