The differences between the constituents of alumina cement and Portland cement are expressed in the three-phase diagram AlO -SiO -CaO. Refractory cements are mainly composed of AlO, SiO and CaO in terms of chemical composition and their degree of refractory varies according to the amount of alumina and impurities in the cement. The mineralogical composition of cements is shown in the AlO.SiO.CaO ternary fuzzy diagram.

The low temperature type of refractory cement, known as fondo cement, has been produced in the country for a long time and is used in low temperature masses such as % alumina castings and lightweight castings. However, in the case of high temperature refractory cements such as % alumina and % alumina, it was mainly produced from abroad. It is mostly used in refractory castings with high quality -% alumina.

The low temperature type of refractory cement, known as fondo cement, has been produced in the country for a long time and is used in low temperature masses such as % alumina castings and lightweight castings. However, in the case of high temperature refractory cements such as % alumina and % alumina, it was mainly produced from abroad. It is mostly used in refractory castings with high quality -% alumina.

Portland cement is relatively high in the CaO region and phases CS and CS are the main phases. On the other hand, calcium alumina refractory cement is located in an area with a lower CaO content, a factor that makes this cement to be used as refractory cement. CA is the main phase of calcium alumina refractory cement and also includes phases CA, C A and / or CAS or CAF, CAFS or a glass phase.