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Cement is an important building material...

Cement is an important building material. Explain the manufacture of cement.

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a. - Calcium silicates & calcium aluminates .CaO+Al_2 O_3+MgO+SiO_2+Fe_2 O_3+SO_3.
b. Gypsm slows down the setting of cement.
c. .Mg..
d. Calcium strengthens the teeth and bones and helps the neuromuscular functions.
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