Description of High Alumina Cement
High alumina cement (formerly known as bauxite cement) is a hydraulic cementitious material with aluminate as the main mineral component, which is prepared by bauxite and lime in a certain proportion, calcined and ground, also known as aluminate cement. It exhibits exceptional refractory properties, including high-temperature resistance, excellent thermal shock resistance, and low shrinkage at elevated temperatures. This cement is specifically designed for applications in high-temperature environments such as furnace linings, kiln linings, and other refractory installations. It offers rapid setting and hardening, achieving high early strength, and demonstrates good resistance to chemical attack, making it suitable for acidic environments.
Kerui High Alumina Cement Technique Data
| アイテム/グレード | CA50 | CA70 | CA80 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| A600 | A700 | A900 | CA70 | CA70W | CA70S | CA71 | CA80 | CA80S | |||
| 化学組成 | ω (SiO2) ≤/% | 7.8 | 7.5 | 5.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | |
| ω（Al2O3)/% | 50.0 | 51.0 | 53.5 | 68.5-70.5 | 68.5-70.5 | 68.5-70.5 | 69.5-71.5 | 78.0-81.0 | 78.0-81.0 | ||
| ω (Fe2O3) ≤/% | 2.5 | 2.5 | 2.5 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | ||
| ω (CaO)/% | / | / | / | 28.5-30.5 | 28.5-30.5 | 28.5-30.5 | 27.5-29.5 | 17.5-20.5 | 17.5-20.5 | ||
| ω (MgO) ≤/% | / | / | / | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | ||
| ω（R2O) ≤/% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | ||
| ω (S) ≤/% | 0.1 | 0.1 | 0.1 | / | / | / | / | / | / | ||
| ω (Cl) ≤/% | 0.1 | 0.1 | 0.1 | / | / | / | / | / | / | ||
| 繊度 | d50/μm | / | / | / | 11-4 | 8-11 | 6-9 | 10-13 | 5-8 | 5-8 | |
| -45μm ≤/% | / | / | / | 8.0 | 5.0 | 5.0 | 8.0 | 5.0 | 5.0 | ||
| セッティング時間 | 初期設定時間（分） | ≥45 | ≥60 | ≥90 | 120-180 | 30-90 | 180-240 | 150-210 | 30-90 | 90-150 | |
| 最終硬化時間（分） | ≤360 | ≤360 | ≤360 | 150-240 | 90-180 | 240-330 | 210-300 | 90-180 | 270-360 | ||
| 強度（ISO） | 曲げ強さ/Mpa | 24h | 6.0 | 6.5 | 8.0 | 7.5-10.0 | 8.0-10.5 | 8.0-10.5 | 8.5-11.0 | 5.0-7.5 | 5.0-7.5 |
| 72h | 7.0 | 7.5 | 10.0 | 10.0-12.0 | 10.5-12.5 | 10.5-12.5 | 11.0-12.5 | 6.0-8.5 | 6.0-8.5 | ||
| 圧縮強さ/Mpa | 24h | 45 | 55 | 72 | 40-50 | 45-55 | 45-55 | 50-60 | 30-40 | 30-40 | |
| 72h | 55 | 65 | 82 | 45-55 | 50-60 | 50-60 | 55-65 | 40-50 | 40-50 | ||
| 325M ≤/% | 15 | 12 | 8 | / | / | / | / | / | / | ||
| 比表面積 ≥/ (㎡/kg) | 300 | 320 | 350 | / | / | / | / | / | / | ||
In addition, we also supply: CA40/41セメント
Advantages of High Alumina Cement
Large Heat of Hydration
Early cement hardening releases a lot of heat. Compared with Portland cement of the same grade, it can release 70-80% of the total heat of hydration in only one day. Due to several heat releases, it is suitable for concrete works with low-temperature curing. As the best supplier in China, Kerui can provide customers with the highest quality products.
Strong Resistance to Sulfate Erosion
The cement stone structure of high alumina cement is dense, the main component is low calcium aluminate, and the content of calcium oxide is very small. During the hydration process, free calcium hydroxide is not precipitated but aluminum hydroxide gel is formed. A protective film is formed on the particle surface.
Good High-Temperature Resistance
It will always maintain a solid state in a high-temperature environment, and the strength of the cement will not change. High alumina cement can be used as a cementing material for heat-resistant concrete and configured into heat-resistant concrete. Welcome to visit Kerui factory to get free quotation.
Early Strength Characteristics
Its early strength increase rate is far higher than that of rapid hardening Portland cement, which is suitable for emergency repair projects, but its strength will decrease later, and its use in structural engineering is limited. Kerui will provide you with professional solutions and high-quality products.
耐火物証明書
ケルイ・グループは、以下のような国際的な認証を数多く取得している、 ISO9001/ISO14001/OHSAS18001/CE/SGS.その上、Keruiのプロダクトはまた多くの国内証明書を持っている、質は非常に保証され、それらは国内および外国の顧客によって一致して認められている。
Application of High Alumina Cement
ケルイ耐火物研究所
ケルイには専門の品質検査室があります。高温再加熱/荷重軟化クリープ試験炉;耐火物圧縮/曲げ強度試験台;耐火物組成試験及び検査プラットフォーム;耐火物物理/化学特性実験室。
耐火物製品の梱包と出荷
納品プロセス全体が追跡され、Keruiの専門家チームが最高のプロフェッショナリズムで特定のプロジェクトニーズを解決します。お客様のプロジェクトが必要とする場合、Keruiの専門家チームはお客様の国へ出向き、対面での技術サポートを提供します。
ケルイ耐火物のお客様事例
Kerui Refractoryは中国本土のほか、アジア、ヨーロッパ、アメリカ、アフリカ、オセアニアなど世界5大陸の50以上の国と地域に製品を輸出しています。世界中のお客様から高い評価と評価を得ており、常にお客様からの再注文や紹介を受けています。
