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List the raw materials required in the manufacture of portland cement. What is the role of gypsum in it?

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Dicalcuim silicate `(26%)`, tricalcuim silicate `(51%)` and tricalcuim aluminate `(11%)`. Gypsum is added to cement to slow down the precess of setting of the cement so that it gets sufficiently hardened.
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Name two important raw materials for the manufacture of cement.

Name two important raw materials for the manufacture of cement.

Cement is one of the most important building material of the present time. It is a dirty greyish heavy powder containing calcium aluminates and silicates. The important raw materials neede for the manufacture of cement are limestone, clay and gypsum. the main step in the manufacture of cement is the heating of raw meal or slurru in the rotary kiln at a very high temperature 1400-1600^(@)C . Finally 2% or 3% gypsum is added. When cement is mixed with water and left as such for sometime, it becomes a hard mass. This is known as setting of cement. It is believed that varous aluminates and silicates present in the cement form hydrates with water which seperate in the form of gel. the gel formed start losing water partly by evaporation and partly by forming hydrates with unhydrated constituents. this results in the formation of a hard mass. Gypsum is added to portland cement

Cement is one of the most important building material of the present time. It is a dirty greyish heavy powder containing calcium aluminates and silicates. The important raw materials neede for the manufacture of cement are limestone, clay and gypsum. the main step in the manufacture of cement is the heating of raw meal or slurru in the rotary kiln at a very high temperature 1400-1600^(@)C . Finally 2% or 3% gypsum is added. When cement is mixed with water and left as such for sometime, it becomes a hard mass. This is known as setting of cement. It is believed that varous aluminates and silicates present in the cement form hydrates with water which seperate in the form of gel. the gel formed start losing water partly by evaporation and partly by forming hydrates with unhydrated constituents. this results in the formation of a hard mass. Portland cement does not contain

Cement is one of the most important building material of the present time. It is a dirty greyish heavy powder containing calcium aluminates and silicates. The important raw materials neede for the manufacture of cement are limestone, clay and gypsum. the main step in the manufacture of cement is the heating of raw meal or slurru in the rotary kiln at a very high temperature 1400-1600^(@)C . Finally 2% or 3% gypsum is added. When cement is mixed with water and left as such for sometime, it becomes a hard mass. This is known as setting of cement. It is believed that varous aluminates and silicates present in the cement form hydrates with water which seperate in the form of gel. the gel formed start losing water partly by evaporation and partly by forming hydrates with unhydrated constituents. this results in the formation of a hard mass. Setting of cement is

Cement is one of the most important building material of the present time. It is a dirty greyish heavy powder containing calcium aluminates and silicates. The important raw materials neede for the manufacture of cement are limestone, clay and gypsum. the main step in the manufacture of cement is the heating of raw meal or slurru in the rotary kiln at a very high temperature 1400-1600^(@)C . Finally 2% or 3% gypsum is added. When cement is mixed with water and left as such for sometime, it becomes a hard mass. This is known as setting of cement. It is believed that varous aluminates and silicates present in the cement form hydrates with water which seperate in the form of gel. the gel formed start losing water partly by evaporation and partly by forming hydrates with unhydrated constituents. this results in the formation of a hard mass. Concrete is a mixture of

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CENGAGE CHEMISTRY ENGLISH-APPENDIX - INORGANIC VOLUME 1-Exercise Short
  1. Compared with the alkaline earth metals, the alkali metals exhibit

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  2. Arrange sulphates of group 2 in decreasing order of solubility of wate...

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  3. Arrange carbonates fo group 2 in increasing order of thermal stability...

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  4. Arrange hydroxides of group 2 elements in order of increasing basicity...

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  5. Arrange Be,Mg,Ca,Sr and Ba in increasing order of reactivity.

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  6. What kind of metals can form superoxides?

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  7. Name the alkali metal which can combine directly with As,P,S and halog...

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  8. Which among Na(2)O(2),Li(2)O,K(3)N and Li(3)N is not known?

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  9. Which among Na,K,Pb and Li has the lowest melting point?

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  10. Name an element which is invariably bivalent and whose oxide is solubl...

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  11. List the raw materials required in the manufacture of portland cement....

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  12. Arrange the following in order of the increasing covalent character: ...

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  13. Which alkali metal and alkaline earth metal are radioactive? Give thei...

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  14. Which alkali metal forms covalent compound?

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  15. Give one important ore of each of sodium and megnesium.

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  16. Give chemical formula of dolomite and carnallite.

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  17. Why the elements of the second row (first short period)? exhibit a nu...

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  18. Name one reagent or one operation to distinguish between: Be(OH)(2) a...

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  19. Sodium cannot be obtained by the electrolysis of aqueous solution of N...

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  20. Dead burnt plaster is

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