高鋁耐火水泥 耐火水泥 硅酸鹽水泥

鋁酸鹽水泥（原高鋁水泥也稱耐火水泥）
用於配製不定型耐火材料；配製膨脹水泥、自應力水泥、化學建材的添加料等；搶建、搶修、抗硫酸鹽侵蝕和冬季施工等特殊需要的工程。
執行標準：GB201-2000《鋁酸鹽水泥》
　　水泥類型：CA-50-5型、6型、7型、8型
　　化學成份（%）：

細度：比表面積不小於300m2/mg或0.045mm篩余不大於20%，由供需雙方商訂，在無約定的情況下發生爭議時以比表面積為準。
　　凝結時間：初凝時間不得早於30min，終凝時間不得遲於6h。
　　強度：各齡期強度值不得低於下表數值。

水泥袋裝每袋淨重50kg，且不得少於標誌質量的98%，隨機抽取20袋總質量不得少於1000kg。其他包裝形式由供需雙方協商確定。在運輸和貯存時應特別注意防潮和不與其他品種水泥混雜，存放期不得超過三個月，過期或受潮結塊，應重新測試合格後方可使用。

　　 1）在施工過程中，一般不得與硅酸鹽水泥、石灰等能析出氫氧化鈣的膠凝物質混合，使用前拌和設備等必須沖洗乾淨。
　　 2）不得用於接觸鹼性溶液的工程。
　　 3）從水泥硬化開始應立即澆水養護，取齡期為7d和14d強度值之低者來確定。
　　 5）若用蒸汽養護加速混凝土硬化時，養護溫度不得高於50℃。
　　 6）用於鋼筋混凝土時，鋼筋保護層的厚度不得小於60mm。
　　 7）未經試驗，不得加入任何外加物。
　　 8）不得與未硬化的硅酸鹽水泥混凝土接觸使用；可以與具有脫模強度的硅酸鹽水泥混凝土接觸使用，但接茬處不應長期處於潮濕狀態

High alumina refractory cement, refractory cement，silicate cement

Aluminate cement (high alumina cement, also known as the original refractory cement) is used in the configuration of unshaped refractory, expansive cement, self-stressing cement and chemical building materials, etc. for special needs such as winter construction project.

Standard: GB201-2000

Cement Type: CA-50-5 type, 6, 7, and 8

Chemical Composition (%):

Fineness: Specific surface area is not less than 300m2/mg, as the agreement made by both sides.

Setting time: Initial setting time is not earlier than 30min and the final setting time not later than 6h.

Strength: The strength of every age value shall not be less than the value of the following table.

Compressive Strength (Mpa) Bending Strength (Mpa)

The net weight of bagged cement is 50Kg, and shall not be less than 98% of marked weight. The total mass of 20 random bags should not be less than 1000Kg. The packaging can be changed by consultation. Special attention should be paid to moisture protection and not mixed with other varieties of cement in the transport and storage, stored period not exceeding for three months and expired or damp clotting, should be re-tested before being used.
1) During the construction, do not mix it with aluminate cement and lime that has hydroxide the cementitious material, and before using the mixing equipments must be washed clean.

2) Do not be used in alkaline solution engineering.

3) It should be immediately watered for conservation from the beginning of hardening.

4) The concrete curing temperature shall not exceed 50 ℃ when accelerating the hardening of refractory cement.

5) When used for steel reinforced concrete, the protective layer thickness should not be less than 60mm.

6) Do not add any external material if not tested.

7) Do not contact with any non-hardening Portland cement.