WEISSZEMENT UND VERFAHREN UND VORRICHTUNG ZU SEINER HERSTELLUNG

White cement incorporates a sulfo-aluminous clinker obtained by clinkering in the presence of oxygen, with an iron oxidation product and is free from X-ray detectable C4AF phase. A white cement comprises a white sulfo-aluminous clinker, obtained by clinkering in the presence of oxygen, a crude material including calcium and/or aluminum sulfate, an aluminum oxidation product, a calcium oxidation product and silica and/or a product containing silica or silicates. All these components are in the anhydride or hydrated form, either individually or in combination. The cement contains more than 0% and up to 2.1% by wt of iron in the form of an oxidation compound and does not contain any C4AF detectable by X-rays. Independent claims are also included for the following: (a) a cement composition incorporating the white cement; (b) a method for the preparation of a white cement using white sulfo-aluminous clinker produced in a roller furnace; and (c) an object obtained by setting of the cement or cement composition with water.