How to write high alumina cement, also known as refractory cement?

High alumina cement is also known as aluminate cement, commonly known as bauxite cement, the number is 625, the raw materials are bauxite and lime, according to a certain proportion of configuration after calcination and grinding to obtain a hydraulic cementitious material, which can be used in refractory castable as a binding agent.

1.The heat of hydration of high-alumina cement is large. It can not be used in large-area concrete engineering and humid and high-temperature engineering, and is most suitable for use in the environment of 5-35 degrees.

2.High-alumina refractory cement has strong resistance to sulfate erosion. The cement and stone structure of high-alumina cement is dense, the main component is low-calcium aluminate, and the calcium oxide content is very small, which is more suitable for application in projects with high requirements for sulfate erosion resistance.

3.High alumina refractory cement has good heat resistance. It will remain solid in a high temperature environment, and the strength of the cement will not change.

4.The use of high-alumina cement is more demanding. The strength of high-alumina cement will decrease in the later stage, especially in the humid and hot environment above 30, the strength of high-alumina cement will decrease faster and more obviously, and it will cause the destruction of the castable structure in serious cases, so it is necessary to be cautious when using high-alumina cement in structural engineering.

5.High alumina cement has weak alkali resistance. High-alumina cement will cause erosion when it comes into contact with alkaline solution, and it will also cause erosion when concrete aggregate contains a small amount of alkaline compounds, so high-alumina cement cannot be used in projects that are in contact with alkaline solution.

Not an architecture major for sureHigh-alumina cementFeel very unfamiliar with what is high-alumina cement? What are the characteristics of high-alumina cement? I definitely don't know anything, and we will answer them one by one for you below, hoping to help you further understand high-alumina cement.

High alumina cement, formerly known as bauxite cement, is a kind of hydraulic cementitious material with aluminate as the main mineral component prepared by calcination and lime as raw materials, calcined and ground finely, also known as aluminate cement.

What are the characteristics of high-alumina cement?

Characteristics of high-alumina cement 1. Early strength characteristics: its early strength increase rate is far more than that of fast-hardening Portland cement, which is suitable for emergency repair projects, but the strength will be reduced in the later stage, and the use of the cover is limited in structural engineering.

2. High alumina cement characteristics 2, large heat of hydration: early cement hardening and heat release is large, compared with Portland cement of the same grade, only one day can release 70 80% of the total heat of hydration. Due to several exothermics, it is suitable for concrete works with low temperature curing.

3. High alumina cement characteristics and strong resistance to sulfate erosion: the hydration process does not precipitate free calcium hydroxide but generates aluminum hydroxide gel, forming a protective film on the surface of the particles. In the later stage of crystal transformation, the erosion resistance is reduced.

4. High alumina cement characteristics and good high temperature resistance: high alumina cement can be used as a cementing material for heat-resistant concrete and configured into heat-resistant concrete.

The above is what is high-alumina cement for you? What are the characteristics of high-alumina cement? The whole content is blind and pure.

High-alumina cement refers to a kind of fast-hardening, high-strength, heat-resistant and corrosion-resistant cementitious material, the main characteristics of which are high early strength, high temperature and corrosion resistance. High-alumina cement is mainly used for projects with urgent construction periods, such as pressure prevention, roads and special emergency repair projects, etc., and can also be used for winter construction projects.

Where calcium aluminate-based, alumina content of about 50% of clinker, grinding hydraulic cementitious material, called high-alumina cementite. It is also known as refractory water Jingcha mud, and the professional name is quietly swimming as: aluminate cement.

High-alumina cement (formerly known as bauxite cement) is a kind of hydraulic cementitious material with aluminate as the main mineral component prepared by calcination and grinding with bauxite and disturbing lime as raw materials, calcined and ground finely, also known as aluminate cement lead.