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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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### Step-by-Step Text Solution: 1. **Identify the Raw Materials for Portland Cement:** - Portland cement is primarily manufactured from four main compounds: - Tricalcium Silicate (3CaO·SiO2) - Dicalcium Silicate (2CaO·SiO2) - Tricalcium Aluminate (3CaO·Al2O3) - Tetracalcium Aluminoferrite (4CaO·Al2O3·Fe2O3) ...
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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

The raw materials required for the manufacture of Na_(2)CO_(3) by Solvay process are :

Gypsum is added to portland cement to

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CENGAGE CHEMISTRY ENGLISH-S-BLOCK GROUP 2 - ALKALINE EARTH METALS-Ex 5.1Subjective
  1. Give reason for, 'NaHCO(3) is known in solid state but Ca(HCO(3))(2) i...

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  2. Contrast the action of heat on the following with reason: a. Na(2)C...

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  3. Complete the following equations for the reaction between

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  4. The enthlpy of formation of hypothetical CaCl((s)) theoretically found...

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  5. Compare and contrast the chemistry of alkali metal with that of alkali...

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  6. What happens when:

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  7. Describe two important uses of each of the following: (i) caustic soda...

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

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  9. Name the chief forms of occurrence of magnesium in nature.

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  10. Commerical aluminium always contains some magnesium, name two such all...

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  11. Why is it that the s-block elements never occur free in nature? What a...

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  12. How will you distinguish between: a. Magnesium and strontium b. K(2)...

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  13. Give reasons for the following:

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  14. How is anhydrous magnesium chloride prepared from magnesium chloride h...

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  15. Give reasons for the following:

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  16. Lattice enthalpies of BeF(2),MgF(2),CaF(2) and BaF(2) are -2906,-2610,...

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  17. On treatment with cold water, an element (A) reacted quietly liberatin...

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  18. Give reasons for the following: a. Anhydrous calcium sulphate (anhyd...

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  19. What happens when: SO(2) is passed through limewater.

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  20. Give the chemical formula of the following: a. Plaster of paris, b. ...

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