Aluminate cement
Aluminate cement is based on aluminum and aluminum soil and limestone. It is made by burn. The calcium calcium is as the main ingredient and an aluminum content of about 50%.
Aluminate cement is often yellow or brown, and it is also gray. The main mineral components of aluminate cement are aluminate (CAO · Al₂O₃, abbreviated CA) and other aluminum acid, as well as a small amount of silicate (2CAO · SIO₂), etc., and the colors are mostly gray and white.
As a binding agent or external agent for irregular refractory materials, aluminum cement is used most. The chemical composition of the cement is mainly al₂o ₃ and CAO, and some of which are quite Fe₂O ₃ and SiO ₂. Together, it becomes a strong whole.
According to the regulations of GB201-2000, the code code of aluminate cement is CA, and the percentage percentage according to the content of Al₂o ₃ is divided into four categories:
CA-50, 50%≤ Al₂O3<60%, referred to as 50 cement, this is the most commonly used refractory cement;
CA-60%≤Al₂O3<68%, referred to as 60 cement;
CA-70, 68%≤Al₂O3<77%, referred to as 70 cement;
CA-80, 77%≤Al2O3, referred to as 80 cement;
Among them, CA-70 and CA-80 cement is generally referred to as pure aluminum calcium concrete cement.
The labels such as CA-50-G6, CA-50-625, CA50-A600 all represent the meaning. In general, the aluminum content is about 50%, and the three-day intensity reaches about 62.5MPa. In the such as push, the G7/725/A700 indicates that the three -day intensity reaches the aluminate cement with a strength of about 72.5MPa.
Aluminate cement has a good high temperature resistance, can still maintain high strength at higher temperatures, and increases with the content of calcium aluminate CA2. Its high temperature resistance is also improved. The binding agent.
