CA70
CA70 is a high-purity calcium aluminate cement engineered for superior refractory performance, featuring a significantly elevated alumina content. Composed predominantly of monocalcium aluminate (CaO·Al₂O₃, or CA), it delivers exceptional mechanical strength, rapid hardening, and outstanding resistance to high temperatures. Produced through a precision sintering process in a rotary kiln using select bauxite and limestone, CA70 is tailored for advanced refractory applications where durability and thermal stability are paramount. Its refined formulation ensures reliable performance in extreme environments, making it a cornerstone for high-performance castables.
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CA70
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Consult NowCA70 – High Purity Calcium Aluminate Cement
CA70 is a high-purity calcium aluminate cement engineered for superior refractory performance, featuring a significantly elevated alumina content. Composed predominantly of monocalcium aluminate (CaO·Al₂O₃, or CA), it delivers exceptional mechanical strength, rapid hardening, and outstanding resistance to high temperatures. Produced through a precision sintering process in a rotary kiln using select bauxite and limestone, CA70 is tailored for advanced refractory applications where durability and thermal stability are paramount. Its refined formulation ensures reliable performance in extreme environments, making it a cornerstone for high-performance castables.
Key Features
● High alumina content for maximum refractoriness
● Rich in monocalcium aluminate for rapid strength development
● Excellent thermal stability and abrasion resistance
● Optimized rheology for versatile casting and gunning applications
● Enhanced compatibility with refractory additives
Benefits
● Provides robust durability in aggressive thermal and chemical conditions
● Accelerates construction with fast-setting properties and early strength
● Ensures flexibility in formulation for tailored refractory solutions
Technical Highlights
CA70 is crafted through a controlled rotary kiln sintering process, resulting in a clinker dominated by CA phases with minimal impurities. Its high-purity composition enhances refractoriness and supports ceramic bonding at elevated temperatures, aligning with industry benchmarks for premium calcium aluminate cements. This cement excels in low-cement and ultra-low cement systems, offering a balance of workability and long-term stability for cutting-edge refractory designs.
Usage Recommendations
Store in a dry, sealed environment to preserve its hydraulic properties. Mix with premium refractory aggregates (e.g., fused alumina or tabular alumina) and apply via casting or gunning techniques for optimal results. Avoid use in reducing atmospheres due to trace iron oxide content.
| CA70 | ||
| Refractoriness(℃) | 1580-1620 | |
| Chemical Composition(%) | ||
| Al2O3(%) | 68.5-70.5 | |
| CaO(%) | 28.5-29.5 | |
| SiO2(%) | 0.2-0.7 | |
| Fe2O3(%) | 0.1-0.5 | |
| Fineness | ||
| Specific Surface of Cement-Bline Method(m2/kg) |
380-420 | |
| Setting Time(min) | ||
| Initial Setting Time(min) | 180-240 | |
| Final Setting Time(min) | 240-300 | |
| Flexural Strength (MPa) | ||
| 24h Flexural(MPa) | 9.0-11.0 | |
| 72h Flexural(MPa) | 11.0-12.0 | |
| Compressive Strength(MPa) | ||
| 24h Compressive(MPa) | 45-55 | |
| 72h Compressive(MPa) | 55-65 | |
| Additional Information | ||
| Principal phase | CA、CA2 | |
| Secondary phase | C12A7、Aα | |
| Other Physical Characteristics | ||
| Bulk density | 850-950kg/m3 | |
| Specific gravity | 2.9-3.1g/cm3 | |
Applications
● Low-cement and ultra-low cement castables for steel furnaces and petrochemical kilns
● High-performance refractory linings in cement and glass production
● Gunning mixes for rapid repairs in high-temperature industrial settings
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