The basic raw materials used for the manufacture of cement are limestone, clay and __________.
a. Gypsum
b. Silica
C. Sodium nitrate
d. Soda Ash
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The basic raw materials used for the manufacture of cement are limestone, clay and __________.
a. Gypsum
b. Silica
C. Sodium nitrate
d. Soda Ash
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Explanation:
silica
Cement is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients. Common materials used to manufacture cement include limestone, shells, and chalk or marl combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore.
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