Cement is an important building material employed in different kinds o

1.	Cement is an important building material employed in different kinds of construction works.1. What are the major raw materials for making cement? 2. How is cement prepared? 3. What are the important ingredients of Portland cement? 4. Explain the Chemistry involved in the setting of cement.
Answer» 1. Limestone, Clay 2. When clay and lime are strongly heated together they fuse and react to form cement clinker. This clinker is mixed with 2- 3% by weight of gypsum to form cement. 3. Dicalcium silicate (Ca₂SiO₄) – 26%, tricalcium silicate (Ca₃SiO₅) – 51% and tricalcium aluminate (Ca₃Al₂O₆) – 11% 4. When mixed with water, the setting of cement takes place to give a hard mass. This is due to the hydration of the molecules of the constituents and their rearrangement.

Cement is an important building material employed in different kinds of construction works.1. What are the major raw materials for making cement? 2. How is cement prepared? 3. What are the important ingredients of Portland cement? 4. Explain the Chemistry involved in the setting of cement.

Answer»

1. Limestone, Clay

2. When clay and lime are strongly heated together they fuse and react to form cement clinker. This clinker is mixed with 2- 3% by weight of gypsum to form cement.

3. Dicalcium silicate (Ca₂SiO₄) – 26%,

tricalcium silicate (Ca₃SiO₅) – 51% and

tricalcium aluminate (Ca₃Al₂O₆) – 11%

4. When mixed with water, the setting of cement takes place to give a hard mass. This is due to the hydration of the molecules of the constituents and their rearrangement.

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Cement is an important building material employed in different kinds of construction works.1. What are the major raw materials for making cement? 2. How is cement prepared? 3. What are the important ingredients of Portland cement? 4. Explain the Chemistry involved in the setting of cement.

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