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Question:

which of these rocks are commonly used in the production of cement?

Quartz Arenite, Shale, Carbonatite, Greywacke, Limestone, Arkose, Altered Granite or Rhyolite?

Answer:

Limestone is used in Portland cement. Powdered clay is mixed with powdered limestone and heated in a revolving kiln. This produces cement which is then combined with water, crushed rock and sand before pouring.

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