Raw material ingredients used for manufacturing of Portland Cement are:

  1. Calcareous Materials: Calcareous Materials are compounds of calcium and magnesium. Limestones are a common calcareous material used in manufacturing cement.
  2. Argillaceous Materials: Argillaceous Materials are mainly silica, alumina, and oxides of iron. Clay and shale are the common argillaceous material used as cement ingredient in the process of manufacturing cement.

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