Products
Refractory Cement CA50
• Al₂O₃ Content: ≥50–53%
• Available Grades: A600 & A700 & A900
• Initial Setting Time: 50–210 min
• 1-Day Compressive Strength: ≥40–70 MPa
• Pyrometric Cone Equivalent: 1400–1450°C
• Function: Hydraulic Binder & Rapid Hardening & Early Strength & Corrosion Resistance
Product Introduction
Refractory Cement CA50 is a calcium aluminate cement containing approximately 50% alumina. It is mainly used as a hydraulic binder in refractory castables, refractory mortars, gunning materials and refractory precast products.
The main mineral component of CA50 cement is calcium aluminate. After mixing with water, it develops strength through a hydraulic setting reaction. Compared with ordinary cement, it provides faster hardening, higher early strength and better performance in high-temperature refractory formulations.
Refractory Cement CA50 has good rheological properties and can be used with casting, vibration and gunning construction methods. Three grades, A600, A700 and A900, are available for different requirements regarding setting time, purity, workability and mechanical strength.
Features
- Rapid hardening.
- High early strength.
- Good hydraulic bonding performance.
- Good high-temperature resistance.
- Stable setting performance.
- Good mechanical strength.
- Good corrosion resistance.
- Suitable for casting and gunning.
- Good compatibility with refractory aggregates.
- Suitable for winter and summer construction.
- Available in different purity and strength grades.
- Can be used for refractory precast products.
Applications
Refractory Cement CA50 is mainly used as a binder for unshaped refractory materials and refractory concrete products.
Typical applications include:
- High alumina refractory castables
- Conventional cement castables
- Alkali-resistant refractory castables
- Low cement castables
- Refractory mortar
- Refractory gunning materials
- Furnace repair materials
- Refractory precast blocks
- Burner blocks
- Furnace door components
- Slag-stopping products
- Industrial furnace linings
- Kiln linings
- Other monolithic refractory products
A600 is commonly selected for conventional high-cement refractory castables and applications requiring rapid hardening.
A700 has lower impurity content and stable strength development. It is suitable for low-cement castables and general high-performance refractory formulations.
A900 is manufactured from higher-purity raw materials. It provides higher alumina content, lower SiO₂ content and greater mechanical strength than A600 and A700. It is suitable for refractory products requiring stable setting, good workability and high strength.
Technical Data:
| Brand | A600 | A600 | A700 | A700 | A900 | A900 |
| Refractory cement Types | Usual range | Specification limit | Usual range | Specification limit | Usual range | Specification limit |
| SiO2, % | 7.8-8.3 | ≤9.0 | 7.0-7.5 | ≤8.0 | 5.0-5.5 | ≤6.0 |
| Al203, % | 50.0-51.0 | ≥50.0 | 50.5-51.5 | ≥50.0 | 53.5-54.5 | ≥53.0 |
| Fe203, % | 1.5-2.5 | ≤3.0 | 1.5-2.5 | ≤3.0 | 1.5-2.0 | ≤3.0 |
| R20, % | – | ≤0.5 | – | ≤0.5 | – | ≤0.5 |
| S-, % | – | ≤0.2 | – | ≤0.2 | – | ≤0.2 |
| CI-, % | – | ≤0.06 | – | ≤0.06 | – | ≤0.06 |
| 325M(%) | – | ≤20 | – | ≤15 | – | ≤8 |
| Specific surface areas, ㎡/kg | – | ≥320 | – | ≥350 | – | ≥380 |
| Setting time, min | ||||||
| Initial setting time IS | 50-120 | ≥30 | 50-120 | ≥30 | 150-210 | ≥150 |
| Final setting time FS | 90-180 | ≤360 | 120-210 | ≤360 | 210-300 | ≤360 |
| Flexural strength, Mpa | ||||||
| 1d | – | ≥5.5 | – | ≥6.5 | – | ≥8.5 |
| 3d | – | ≥6.5 | – | ≥7.5 | – | ≥9.5 |
| Compressive strength, Mpa | ||||||
| 1d | 45-55 | ≥40 | 50-60 | ≥50 | 70-75 | ≥70 |
| 3d | 50-60 | ≥50 | 60-65 | ≥60 | 80-85 | ≥80 |
The technical data above are typical reference values. Final specifications may vary according to raw materials, production batches, testing standards and storage conditions. Please confirm the product data sheet before placing an order.
