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Home > Knowledge
Aluminous Cement, also known as high alumina cement or calcined aluminate cement, is a special refractory cement made from ores (such as kaolin, bauxite, gangue, etc.) and calcined at high temperatures. The main component of aluminate cement is calcium aluminate (CA), which has a high aluminum oxide (Al2O3) content, usually between 40% and 70%.
Aluminate cement has the following characteristics
1. Shorter initial and final setting times: Compared with ordinary Portland cement, aluminate cement sets faster and can reach a certain strength in a short time, which is beneficial to shorten the construction period.
2. Suprior high-temperature performance: Aluminate cement has high fire and heat resistance, and can maintain stability and mechanical properties in high-temperature environments. Therefore, it is often used in refractory materials and high-temperature equipment.
3. Chemical corrosion resistance: Aluminate cement has good acid resistance, alkali resistance, salt-resistance, and corrosion resistance, and is suitable for use in chemical, petroleum, and other industries where chemical corrosion may occur.
4. Thermal shock resistance: Since aluminate cement has a low thermal expansion coefficient, it can better resist thermal stress when temperature changes and has strong thermal shock resistance.
5. Anti-permeability: Aluminate cement has good anti-permeability, which can effectively prevent the penetration of moisture and corrosive substances and improve the durability of the structure.
Aluminate cement is widely used in refractory materials, high-temperature equipment, chemical engineering, water conservancy engineering, and other fields. In terms of refractory materials, aluminate cement is commonly used to produce refractory castables, refractory mortars, and refractory prefabricated components. During the construction process, the appropriate aluminate cement type should be selected according to specific working conditions and requirements to ensure its performance and service life.
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