Calcium Aluminate

Calcium aluminate is a compound that consists of calcium oxide (CaO) and aluminum oxide (Al2O3). It has the chemical formula CaAl2O4 and is also known as calcium dialuminate or C12A7.

Calcium aluminate is a white crystalline solid with a high melting point and is insoluble in water. It is commonly used in the production of refractories, which are materials that can withstand high temperatures and are used in industrial furnaces and kilns. Calcium aluminate is also used as a cement additive to improve its properties, such as setting time and strength.

When calcium aluminate is exposed to water, it undergoes a reaction called hydration, forming calcium aluminate hydrates (CAH), which contribute to the strength of cement. However, if too much calcium aluminate is added to cement, it can lead to rapid setting and early hardening, which can be problematic during construction.

In summary, calcium aluminate is an important compound with various industrial applications, particularly in the production of refractories and as a cement additive. Its properties and behavior when exposed to water make it a useful material for certain applications, but care must be taken to avoid negative effects on cement properties.