Comment 72291

By GerryM (registered) | Posted December 15, 2011 at 07:55:11

A further clarification: quicklime is the term for calcium oxide produced by heating limestone (or dolomite) to drive off the carbon dioxide. Simple quicklimes can be used to make cement or mortar, by mixing with sand or other materials. But Portland cement is produced by burning a mixture of limestone with silica bearing materials: this yields calcium silicate "clinker" which is then mixed with gypsum and other materials and ground to a powder to produce Portland cement.

Comment edited by GerryM on 2011-12-15 07:58:13

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