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Product category|Refractory Concrete
Type: High Alumina Concrete
Al₂O₃%: ≤80
Refractoriness: ≤900℃
Online Time: 7*24 hours
Refractory Concrete also know as refractory, is a kind of granular and powder material which is made of refractory material add some amount of binder. High fluidity, so suitable for the unshaped refractoriness which is formed in the way of pouring. Compared with other unshaped refractory materials, the castable has more binder and moisture content, better fluidity, so the unshaped refractory material is widely used, the materials and binder can be chosen according to the usage conditions. And the castable can not only be directly poured into the lining of the kilns, but also be made into precast block in the way of pouring or vibrating.
Strong integrity and good air tightness
High refractory temperature and good strength
Extend kiln life
Reduce material consumption and increase production
It is mainly used to construct the integral furnace lining in industrial furnaces and to make prefabricated blocks. Among them, those used below 900℃ are called heat-resistant concrete and are used in the foundations and chimneys of industrial kilns and thermal equipment.
| Item | High Alumina Concrete | |||||
| CA50 | CA65 | CA70 | CA75 | CA80 | ||
| Al₂O₃%≤ | 50 | 64-66 | 69-71 | 73-75 | 77-80 | |
| Fe₂0₃%≤ | 2.5 | 0.8 | 0.7 | 0.6 | 0.5 | |
| Si0₂%≤ | 7.5 | 1.2 | 1 | 0.8 | 0.5 | |
| R₂0%≤ | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Cl%≤ | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | |
| S%≤ | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | |
| 325 mesh reminds | 12 | 5 | 5 | 5 | 5 | |
| Surface(m²/kg)≥ | 320 | 380 | 400 | 430 | 450 | |
| Initial Setting Time,min≥ | 60 | 120 | 120 | 120 | 120 | |
| Final Setting Time,min≤ | 360 | 420 | 420 | 420 | 420 | |
| Crushing Strength MPa≥ | 1day | 55 | 45 | 40 | 35 | 30 |
| 3days | 65 | 55 | 50 | 45 | 40 | |
| Bending Strength MPa≥ | 1day | 6.5 | 5.8 | 5.5 | 5.2 | 5 |
| 3days | 7.5 | 6.7 | 6.5 | 6.3 | 6 | |
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