Jianai aluminate cement

Aluminate cement is a hydraulic cementitious material made from bauxite and limestone as raw materials, clinker with calcium aluminate as the main component and an alumina content of about 50%, and then ground. Aluminate cement is often yellow or brown, but also gray. The main minerals of aluminate cement are monocalcium aluminate (CaO·Al2O3, abbreviated as CA) and other aluminates, as well as a small amount of dicalcium silicate (2CaO·SiO2).

Aluminate cement sets and hardens quickly. The 1d strength can reach more than 80% of the strength, and is suitable for various industrial kilns such as metallurgy, chemical industry, petroleum, electric power, machinery, and building materials. It is mainly used for projects with urgent construction schedules, such as national defense, roads and special emergency repair projects.

Aluminate cement has a large heat of hydration and a concentrated heat release. The heat of hydration released within 1 day accounts for 70% to 80% of the total amount, causing the internal temperature of the concrete to rise significantly. Even when constructed at -10°C, aluminate cement can quickly solidify and harden, and can be used for winter construction projects.

Under ordinary hardening conditions, aluminate cement has strong resistance to sulfate corrosion because the cement stone does not contain tricalcium aluminate and calcium hydroxide and is relatively dense.

Aluminate cement has high heat resistance. If refractory coarse and fine aggregates (such as chromite, etc.) are used, heat-resistant concrete with a service temperature of 1300 to 1400°C can be made.