CA50 Refractory Cement is a calcium aluminate cement (CAC) with an alumina content of approximately 50%, mainly composed of calcium aluminate phases. It is widely used as a hydraulic binder for refractory castables, gunning materials, repair mixes, and other monolithic refractory applications requiring rapid hardening, early strength development, and reliable high-temperature performance.

CA50 Refractory Cement is manufactured from carefully selected raw materials through a controlled sintering process. It provides good workability, stable setting behavior, and strong mechanical performance after curing. Depending on the required purity, setting characteristics, and strength development, CA50 is available in different grades, including A600, A700, and A900.

Physicochemical Parameters

Items	A600 Typical	A600 Limit	A700 Typical	A700 Limit	A900 Typical	A900 Limit
SiO₂ (%)	7.8–8.3	≤9.0	7.0–7.5	≤8.0	5.0–5.5	≤6.0
Al₂O₃ (%)	50.0–51.0	≥50.0	50.5–51.5	≥50.0	53.5–54.5	≥53.0
Fe₂O₃ (%)	1.5–2.5	≤3.0	1.5–2.5	≤3.0	1.5–2.0	≤3.0
R₂O (%)	—	≤0.5	—	≤0.5	—	≤0.5
S (%)	—	≤0.2	—	≤0.2	—	≤0.2
Cl⁻ (%)	—	≤0.06	—	≤0.06	—	≤0.06
325 Mesh (%)	—	≤20	—	≤15	—	≤8
Specific Surface Area (m²/kg)	—	≥320	—	≥350	—	≥380
Initial Setting Time (min)	50–120	≥30	50–120	≥30	150–210	≥150
Final Setting Time (min)	90–180	≤360	120–210	≤360	210–300	≤360
Flexural Strength, 1d (MPa)	—	≥5.5	—	≥6.5	—	≥8.5
Flexural Strength, 3d (MPa)	—	≥6.5	—	≥7.5	—	≥9.5
Compressive Strength, 1d (MPa)	45–55	≥40	50–60	≥50	70–75	≥70
Compressive Strength, 3d (MPa)	50–60	≥50	60–65	≥60	80–85	≥80

The above values are typical reference data. Actual product properties may vary according to production conditions and testing methods. Customized specifications can be discussed according to the customer’s refractory formulation and operating requirements.

Product Features

Rapid Hardening and Early Strength: CA50 Refractory Cement provides rapid hydration and early strength development, allowing refractory castables and repair materials to reach sufficient green strength within a relatively short period.
Good Workability: Its rheological properties are suitable for casting and gunning applications. Properly formulated CA50-based mixes can provide good flowability and installation performance.
Reliable High-Temperature Performance: The calcium aluminate-based composition is designed specifically for refractory applications and provides stable bonding performance at elevated temperatures.
Different Grade Options: A600, A700, and A900 provide different levels of purity, setting characteristics, and strength development, allowing users to select the appropriate binder according to the refractory formulation.
Lower Impurity Options: A700 and especially A900 offer reduced impurity levels compared with conventional A600, making them suitable for more demanding refractory applications.
Suitable for Different Seasons: CA50 can be used for refractory projects carried out in different environmental conditions when appropriate mixing, curing, and installation procedures are followed.
Strong Mechanical Performance: CA50-based refractory formulations can achieve high flexural and compressive strength, particularly when higher-performance grades such as A700 and A900 are selected.

Applications

CA50 Refractory Cement is widely used as a hydraulic binder in monolithic refractory systems, including:

High Cement Castables: Used as a bonding component in conventional high-cement refractory castables.
Low Cement Castables: A700 and A900 are suitable for low-cement formulations requiring controlled hydration and high mechanical strength.
High Alumina Castables: Provides reliable bonding for high-alumina refractory formulations.
Alkali-Resistant Castables: A600 can be used in high-performance alkali-resistant refractory materials.
Gunning Materials: Suitable for refractory mixes applied by gunning equipment.
Refractory Repair Materials: Used in repair compounds requiring rapid hardening and early strength.
Slag-Stopping Materials: Suitable grades can be incorporated into refractory materials used around steelmaking and metallurgical equipment.
Industrial Furnace Linings: Used in monolithic refractory systems for furnaces and other high-temperature equipment.
Kiln Linings: Suitable for refractory castables used in various industrial kilns.
Other Monolithic Refractories: Can be combined with suitable refractory aggregates and additives to develop customized refractory formulations.

The appropriate CA50 grade should be selected according to the refractory aggregate, cement content, installation method, required setting time, mechanical strength, service temperature, and chemical environment.

Customization Services

Xintai Refractory can supply different CA50 grades and discuss customized refractory cement requirements according to specific project conditions.

Customization can be considered based on:

Required Al₂O₃ content
SiO₂ and Fe₂O₃ limits
Setting time
Compressive strength
Flexural strength
Specific surface area
Particle size distribution
Refractory aggregate compatibility
Cement addition percentage
Casting or gunning method
Required working temperature
Chemical corrosion environment
Packaging requirements

For large-volume industrial projects, Xintai can also provide technical recommendations for selecting the appropriate CA50 grade according to the customer’s castable formulation and application conditions.

Packing and Shipping Details

Packing: Available in moisture-resistant bags, buckets, or other suitable containers according to product formulation and customer requirements.
Standard Packaging: Common industrial packaging can be supplied for regular orders.
Customized Packaging: Private labeling, customized bag sizes, and project-specific packaging can be provided upon request.
Storage: Store in a dry, cool, and well-ventilated location. Protect the product from moisture and keep packaging properly sealed before use.
Shipping: Suitable for sea, air, and road transportation depending on order quantity and destination.
Export Service: Professional export packaging and documentation can be provided for international orders.

About Xintai Refractory

Xintai Refractory supplies calcium aluminate cement for refractory manufacturers, furnace contractors, foundries, steel plants, cement plants, and other high-temperature industries.

With controlled raw material selection, stable manufacturing processes, quality inspection, and flexible packaging options, Xintai can provide CA50 refractory cement for both standard and customized refractory formulations.

Customers can select from A600, A700, and A900 according to required purity, setting behavior, strength development, and application conditions.

For bulk orders and industrial projects, Xintai can also provide technical specifications, product samples, customized formulations, and export packaging.

Contact Xintai Refractory for CA50 Refractory Cement A600, A700, or A900, factory pricing, technical specifications, samples, and customized calcium aluminate cement solutions.