华商宝

高铝耐火水泥  耐火水泥 硅酸盐水泥

    铝酸盐水泥（原高铝水泥也称耐火水泥）
    用于配制不定型耐火材料；配制膨胀水泥、自应力水泥、化学建材的添加料等；抢建、抢修、抗硫酸盐侵蚀和冬季施工等特殊需要的工程。
    执行标准：GB201-2000《铝酸盐水泥》
　　水泥类型：CA-50-5型、6型、7型、8型
　　化学成份（%）：

    细度：比表面积不小于300m2/mg或0.045mm筛余不大于20%，由供需双方商订，在无约定的情况下发生争议时以比表面积为准。
　　凝结时间：初凝时间不得早于30min，终凝时间不得迟于6h。
　　强度：各龄期强度值不得低于下表数值。

    水泥袋装每袋净重50kg，且不得少于标志质量的98%，随机抽取20袋总质量不得少于1000kg。其他包装形式由供需双方协商确定。在运输和贮存时应特别注意防潮和不与其他品种水泥混杂，存放期不得超过三个月，过期或受潮结块，应重新测试合格后方可使用。

　　 1）在施工过程中，一般不得与硅酸盐水泥、石灰等能析出氢氧化钙的胶凝物质混合，使用前拌和设备等必须冲洗干净。
　　 2）不得用于接触碱性溶液的工程。
　　 3）从水泥硬化开始应立即浇水养护，取龄期为7d和14d强度值之低者来确定。
　　 5）若用蒸汽养护加速混凝土硬化时，养护温度不得高于50℃。
　　 6）用于钢筋混凝土时，钢筋保护层的厚度不得小于60mm。
　　 7）未经试验，不得加入任何外加物。
　　 8）不得与未硬化的硅酸盐水泥混凝土接触使用；可以与具有脱模强度的硅酸盐水泥混凝土接触使用，但接茬处不应长期处于潮湿状态

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.