In this study, the evaluation of aluminium dross from secondary production in calcium aluminate cement was investigated. Salt compounds were removed significantly by washing. Mixtures washed and quicklime prepared to obtain a additive considering standard with low alumina they sintered at 1250 °C for 5 h. The phases mayenite, monocalcium aluminate, grossite, gehlenite, larnite, periclase spinel...

AIM To report the hydration mechanism of white mineral trioxide aggregate (White MTA, Dentsply, Tulsa Dental Products, Tulsa, OK, USA). METHODOLOGY The chemical constitution of white MTA was studied by viewing the powder in polished sections under the scanning electron microscope (SEM). The hydration of both white MTA and white Portland cement (PC) was studied by characterizing cement hydrate...

Cement is produced by co-grinding clinker, gypsum and other components defined in the Cement Standards like limestone, pozzolans, fly ash and slag. The grinding is usually performed in horizontal ball mills. Gypsum is typically the basic source of sulphates (SO3) in the cement. The effect of gypsum on the cement quality is critical and twofold. It affects two of the main properties of this prod...