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Product Name:Calcium Aluminate Cement
Product Description:
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Introduction of calcium aluminate cement:
Cement with a calcium aluminate (CaO?Al2O3) or two calcium aluminate (CaO?2Al2O3) as the main mineral composition.It is natural bauxite or industrial alumina and calcium carbonate (limestone) according to a certain proportion with calcination or electric fusion and made of, also useful bauxite and limestone with melting and made of.
Composition and Classification
Calcium aluminate cement according to its chemical composition can be divided into ordinary calcium aluminate cement (Al2O3 53 ~ 72%, CaO 21 ~ 35%) and pure calcium aluminate cement (Al2O3 72 ~ 82%, CaO 19 ~ 23%) two categories.Pure calcium aluminate cement can be divided into ordinary type (Al2O3 72 ~ 78%) and ultra-high aluminum type (Al2O3 78 ~ 85%) of two kinds.JiaNai cement CA70 is common type pure calcium aluminate cement, CA80 is super high aluminum type pure calcium aluminate cement.
Product Name
JIANAI Aluminate Cement
Product Model
CA70
Classification
Pure Calcium Aluminate Cement
Specifications
5kg,25kg
Alumina Content
70%
Production Process
Rotary Kiln
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Degree Of Fineness
0.045mm shorts
≤20
Burnett's Specific Surface Area
≥350㎡/kg
Setting Time
Initial Setting Time
≥30min
Final Setting Time
≤6h
Flexural Strength Consummation
1 Day
≥5MPa
3 Days
≥6MPa
Strong Pressure Execute
1 Day
≥30MPa
3 Days
≥40MPa
Hardening mechanism:
The setting and hardening speed of calcium aluminate cement are also related to curing temperature.With the increase of curing temperature, the solidification and hardening speed of Ca2 mineral is accelerated, while Ca mineral is somewhat abnormal, which is faster at about 20℃, then slower at 30℃, and faster at 30℃.According to the phase transformation of calcium aluminate hydrate during heating, it is very important to choose the appropriate curing conditions.Because calcium aluminate cement hydration hydrate generated with different curing conditions and different.
In the actual use often see a lot of different grades of calcium aluminate cement, label is the cement curing after a certain time to achieve the strength.Such as calcium aluminate cement with CA as the main mineral, is generally based on the strength of its curing after 3D to achieve the label, bauxite cement label and the corresponding physical properties see Table 2.The calcium aluminate cement with CA2 as the main mineral is the strength achieved after curing 7d as the label.
Advantages:
Higher Bonding Strength More Suitable For Low Cement Castable
1. It gives high mechanical properties to non-qualitative and is suitable for high-temperature environments in excess of 1400℃ and in contact with moltenmetals.This medium does not contain any materialsadditives, therefore, compatibility to fire resistance is better than that of competitors.
2. Adaptability and product compatibility: suitable for amorphous refractory materials with high technical content, such as: low cement castable (cement content of 4~7%), ultra-low cement castable (cement content of 1~4%), etc., and also widely applicable to all kinds of construction methods.
3. Stability: adopt the unique mineral phase detection technology of Kenos company for process control, and the product quality is stable.
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Pure Calcium Aluminate Cement Basic Applications:
- Used for preparing shaped or unshaped refractory castables, kiln lining, ladle, prefabricated parts, iron hook material, etc.;
- Suitable for engineering projects that resist high temperature erosion;
- Suitable for concrete works requiring fast hardening and emergency repair works;
- Suitable for winter construction and special projects requiring early strength;
- Used for manufacturing oxygen lance;
- It is an important part of preparing other special materials.
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Notes for use:
1. In the construction process: in order to prevent the bonding time out of control, it shall not be mixed with Portland cement, lime and other cements that can precipitate calcium hydroxide, and the mixing equipment must be washed clean before use.
2. It shall not be used for engineering that contacts alkaline solution.
3. Cement hydration heat is concentrated in the early release, from the beginning of hardening should be immediately watering maintenance.It is generally not suitable to pour large volume concrete.
4. The strength of pure calcium aluminate cement concrete decreases greatly in the later stage, so it should be designed according to the lowest stable strength.The minimum stability strength of CA70 cement concrete is determined by putting the sample in water at 50℃±2℃ after demolding and taking the lowest strength value of 7d and 14d as the age.
5. If there is steam curing to accelerate concrete hardening, |
