Resumen de Research of the lime rich portions of the CaO-SiO2-P2O5 system
A. Diouri, A. Boukhari, J. Aride, F. Puertas, T. Vázquez
A detailed study has been carried out to explain the influence of Pp^ in silicate phases and in industrial raw meals upon their mineralogical compositions. Some compositions in the lime rich portion of the CaO-SiO2-P2O5 system are studied using laboratory reactants. The results showed that the compositions lying in the range of CaO = 69,5-70,1; P2O5= 16,2-19,5; SiO2 = 11,1-13,6 (wt%) give, at 1000 °C, the mineralogical composition (HAp, β-C2S, C5PS) which can develop a high strength in chemically bonded ceramics. At high temperature (1400 ºC) these compositions give a large amount of silicocarnotite (C5PS) and 2C2.C3P phase. A selected composition of the industrial raw meal with added phosphate: CaO = 62,66; SiO2 -= 17,33; Al2O3 = 4,88; Fe2O3 = 4,29; P2O5 = 8,73; MgO = 2,09 (wt%) forms at 1350 ºC a clinker containing high amount of α-C2S to replace C3S. Such a clinker may have good applications in the synthesis of active belite cement.
