The sulfate resisting (SR) Portland cement is a hydraulic binder designed for works in rich sulfate environments such as swamps, seawater, lakes and industrial plant discharges. These special cements have a very particular mineralogical composition: C3A ≤ 3% and (2C3A + C4AF) ≤ 20%, which makes the cementitious matrix resistant to the aggressiveness of sulfate ions. The company "La Société les Ciments de Bizerte" (SCB), to face against the competition in national and international markets, finds in the production of SR Portland cement a solution in order to diversify its range of production, especially that its selling price is higher than for ordinary Portland cements. In this context, a study aims to optimize a raw meal that obeys the normative requirements of a SR Portland cement from only the raw materials (ordinary limestone, marl, iron ore...) specific to the SCB. This work is done essentially by means a program of the calculation of raw meal and on the analysis of the chemical composition of the selected raw materials by X-ray fluorescence (XRF).
I. Labidi, S. Boughanmi, H. Tiss, A. Megriche
Sulfate resisting Portland cement, C3A, C4AF, raw materials, raw meal, calculation program, XRF.