High temperature resistance;
High early strength;
Rapid and complete wet hydration;
Stable physical performances;
Low water requirement;
Excellent biological acid erosion;
Acts as a bonding material in refractory castables;
Large hydration heat.
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Calcium aluminate cement is a cement containing calcium monoaluminate (CaO·Al 2 O 3 ) or calcium aluminate (CaO·2Al 2 O 3 ) as the main mineral component. It is made of natural bauxite or industrial alumina and calcium carbonate (limestone) in a certain proportion, calcined or electrofused, and also made by mixing iron bauxite and limestone. Calcium aluminate cements are cements consisting predominantly of hydraulic calcium aluminates. Alternative names are “aluminous cement”, “high-alumina cement” and “Ciment fondu” in French. They are used in a number of small-scale, specialized applications.
| Calcium Aluminate Cement | ||||||
| CA-65 | CA-68 | CA-70 | CA-75 | CA-80 | ||
| Chemical Composition (%) | Al2O3 | 64-66 | 67-69 | 69-71 | 73-75 | 77-80 |
| CaO | 32-34 | 29-31 | 27-29 | 23-25 | 18-20 | |
| SiO2 | 1.8 | 1.2 | 0.3 | 0.3 | 0.3 | |
| Fe2O3 | 0.6 | 0.6 | 0.3 | 0.3 | 0.3 | |
| Specific Surface (cm2/g) | 4500 | 4500 | 5000 | 5500 | 7000 | |
| Setting time (h:min) | Initial setting (min) | 0:40 | 0:40 | 0:40 | 0:45 | 0:45 |
| Final Setting (min) | 8:00 | 8:00 | 10:00 | 10:00 | 10:00 | |
| Cold Modulus of Rupture (MPa) | 24 hour | 6.0min | 6.0min | 6.0min | 6.0min | 5.0min |
| 72 hour | 8.0min | 8.0min | 8.0min | 8.0min | 6.0min | |
| Cold Crushing Strength (Mpa) | 24hour | 45.0min | 45.0min | 45.0min | 45.0min | 35.0min |
| 72hour | 70.0min | 70.0min | 70.0min | 70.0min | 60.0min | |
| Refractoriness (°C) | 1680 | 1710 | 1730 | 1750 | 1770 | |
Calcium aluminate cement is mainly used in coke ovens, glass kilns, blast furnace hot blast furnaces, and other industrial kilns.Applied industries: metallurgy, building materials, machinery, petrochemical, glass, boilers, electricity, steel, cement, and so on.
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