High alumina cements are widely used in refractory industry, mainly for the manufacture of refractory concrete. It is known fact that from the components of refractory concrete, high alumina cement is the fondant component of the system due to the lower melting point of the mineralogical compounds contained, compare to the refractory aggregates used. To improve the behaviour at high temperature of high alumina cement, we will try to obtain high alumina cements based on calcium-aluminates compounds with higher refractory toward the usual high alumina cement based on monocalcium monoaluminate and dicalcium monoaluminate. However, because with the improvement of refractoriness of calcium-aluminates compounds form high alumina cement, the hydraulically properties decrees, we will try to increase the hydraulically properties with an accelerator additive, such as calcium sulphoaluminate. This paper aims to present the structural and mechanical behaviour of high alumina additivated cement based on high mineralogical refractory compounds such as dicalcium monoaluminate and monocalcium hexa aluminate in comparison with the usual high alumina cement, at normal temperature and after treatment at high temperature heat, too.
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