Description of aluminous cement
Aluminous cement, also known as aluminous cement or aluminate cement, is a special type of cement that has high strength and chemical resistance. Aluminous cement GC is a fast-acting hydraulic mixture, the main distinguishing feature of which is the ability to quickly harden in water and air. It is suitable for the manufacture of products that require resistance to high temperatures. Cement GC can be used to prepare special heat-resistant concrete. The cement is characterized by an extremely high level of fire resistance - according to experts, monoliths made from such a solution can be used at temperatures up to +1700 C. Kerui Refractory offers high-quality Aluminous cement ГЦ-40, ГЦ-50, ГЦ - 60.
Characteristics of aluminous cement
| Chemical composition of aluminous cement | Characteristics of alumina cement |
| Name | Alumina cement |
|---|---|
| Al2O3, % | 35-55 |
| CaO, % | 35-45 |
| Fe2О3, % | 5-15 |
| SiO2, % | 5-15 |
| Name of indicator | Значение для цемента марки | ||
|---|---|---|---|
| ГЦ-40 | ГЦ-50 | ГЦ-60 | |
| 1. Предел прочности при сжатии, МПа, не менее, в возрасте | |||
| 1 сут | 22,5 | 27,4 | 32,4 |
| 3 сут | 40,0 | 50,0 | 60,0 |
| 2. Тонкость помола: | |||
| остаток на сите с сеткой №008 по ГОСТ 6613, % не более | 10 | 10 | 10 |
| 3. Сроки схватывания: | |||
| начало, мин, не ранее | 45 | 45 | 45 |
| конец, ч, не позднее | 10 | 10 | 10 |
Characteristics of cement CA40/41
| Mark | CA40 | CA41 | |||
|---|---|---|---|---|---|
| - | Standard | Typical range | Standard | Typical range | |
| Chemical composition(%) | |||||
| Al2O3 | 37.0-41.0 | >37.0 | 43.0-48.0 | >43.0 | |
| CaO | 36.0-40.0 | <41.0 | 35.0-38.0 | <40.0 | |
| SiO2 | - | <6.0 | - | <7.0 | |
| Fe2O3 | 13.0-17.0 | <18.0 | 4.0-9.0 | <10.0 | |
| MgO | - | <1.5 | - | <1.5 | |
| TiO2 | - | <3.0 | - | <3.0 | |
| R2O | - | <0.5 | - | <0.5 | |
| S | - | <0.1 | - | <0.1 | |
| CL- | - | <0.06 | - | <0.06 | |
| Fineness | |||||
| +45μm(%) | - | <15.0 | - | <15.0 | |
| S(m2/kg) | 350-400 | >300 | 350-400 | >300 | |
| Setting time (min) | |||||
| Start of IS setting | 60-130 | >45 | 100-180 | >90 | |
| Конец схватывания FS | 100-180 | <240 | 120-200 | <300 | |
| Прочность на изгиб(МПа) | |||||
| 6h | - | >4.0 | - | >4.0 | |
| 1d | - | >5.0 | - | >6.0 | |
| 3d | - | >6.0 | - | >6.5 | |
| Прочность на сжатие (МПа) | |||||
| через 6 часов | - | >30 | - | - | |
| через сутки | 50-55 | >50 | 55-60 | >55 | |
| через 3 суток | 55-65 | >55 | 60-70 | >60 | |
| Технологичность(Распространение после 15 минут)(%) | - | >30 | - | >50 | |
| Огнеупорность (℃) | - | 1270℃ | - | 1310℃ | |
| Объёмный вес (кг/м3) | - | 900-1000 | - | 900-1000 | |
| Удельный вес(г/м3) | - | 2.9-3.1 | - | 2.9-3.1 | |
Преимущества глиноземистого Цемента ГЦ
Alumina cement has good resistance to corrosion, especially when in contact with sea water. Therefore, it can be used in the construction of port facilities, berths and other objects that are exposed to water.
Alumina cement has chemical resistance to aggressive environments such as acids, alkalis and other chemical compounds. Therefore, it is often used in industrial buildings such as chemical processing plants.
Alumina cement hardens faster than regular Portland cement. This allows for faster construction and reduced waiting time for further work, increasing efficiency.
Alumina cement has high heat resistance, which makes it suitable for use in high temperature conditions, such as in the construction of furnaces, fireplaces and thermal power plants and so on.
Alumina Cement has high strength. Excellent indicators are explained by the content of calcium aluminates. The process of gaining strength is accompanied by the release of a large amount of thermal energy.
Application of Alumina Cement
- For the production of concrete and reinforced concrete structures.
- For the construction of marine and underground structures where increased sulfate resistance is required.
- For plugging cold oil wells, plugging cracks in rocks with high water flow rates.
- For sealing holes in sea transport vessels.
- For the rapid construction of foundations for machines, pouring anchor bolts, restoring damaged buildings and bridges.
- For the production of precast concrete products in reinforced concrete plants and construction sites, where aluminous cement acts as a concrete hardening accelerator.
- For the production of containers and other structures where aluminous cement provides increased resistance to organic acids, sulfur compounds, sulfuric acid, lactic acid, saline solution, and starch.
- For the production of refractory concrete and individual products with fire resistance up to 1700 gr. C.
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