Linked from
The 17 pages that link to Cement, each with the reason it gives.
ConcreteCompared with: Concrete is a composite material; cement is only one possible ingredient.
GypsumRelated: Small gypsum additions regulate the setting time of Portland cement.
ChalkRelated: Chalk can provide carbonate feedstock for cement production.
SuspensionRelated: Fresh cement paste contains solid particles dispersed in water before it sets.
Bulk cargoBroader topic: Cement commonly travels as powdered bulk cargo for construction markets.
Calcium oxideRelated: Calcium oxide is a major constituent of Portland cement clinker.
Calcium sulfateRelated: Calcium sulfate is added to regulate the setting of Portland cement.
ComminutionRelated: Cement manufacture includes grinding clinker into a fine powder.
AnhydriteRelated: Small amounts of anhydrite regulate setting in Portland cement.
Carbonate rockRelated: Limestone supplies most of the carbonate raw material for Portland cement.