CA-80 is a calcium-alumina refractory cement produced by Pasargad Refractory Materials Company. 80% refractory cement is an alumina refractory cement and compared to other types of refractory cement, it has the highest amount of alumina. This product is a mixture of calcium aluminate compounds and alumina compounds. This cement is equivalent to SECAR 80 cement and is used in the form of a compound to produce high-grade and routine castables in the range of 55-85%. CA-80 refractory cement is used in the production of RC (high cement) – MCC (medium cement) – LCC (low cement) masses. Refractory cement sets 80% quickly and then reaches its final strength in a short period of time. The technical specifications are given below
In these cements, in order to obtain high reactivity with water, strength and installability, they are very fine-grained in terms of granulation. According to the specific surface, the fineness of these products is usually between 2500 and 5000 cm2/gr. In alumina-rich cements, this number may reach 7000 to 10000 cm2/gr.
The most important phases formed in CA-80 refractory cement are:
CA – monocalcium aluminate: helping the initial setting and hardening of the cast mass, helping to increase strength. Increase flow and mass casting
CA2 – dicalcium aluminate: helping to increase the final strength of the cast mass
Alfa Alumina – Alfa Alumina: increasing the incombustibility of the composition of refractory castable mass. Increasing the fine-grained part of the castable mass product. Increase in flu mass
After mixing cement with water, calcium aluminate phases start to react with water and form calcium aluminate hydrates, which causes the formation of new bands and their sticking in the castable mass.
