Basic overview of Xintai aluminate cement?

2023-02-09

Do you know what Xintai aluminate cement is? What are all its functions? About these issues I believe that most of the friends still do not understand it. But we do not throw too anxious, today's article mainly for you to tell and Xintai aluminate cement of the basic overview? If you are also interested in this topic, then look down with the editor, I hope you can bring some better help in the selection after seeing it.

Although Xintai aluminate cement is used in many industries, most people still feel unfamiliar when they see it. Therefore, the first thing we need to know before using Xintai aluminate cement is a water-hard cementitious material made of bauxite and limestone as raw materials, with calcium aluminate and about 50% alumina as the main ingredients of calcined clinker, which is ground. It is usually yellow or brown, but it is also available in gray. In fact, its main minerals are calcium aluminate I and other aluminates, and a small amount of dicalcium silicate (2CaO-SiO2). The color is mostly gray and white. When using it, you should know that Xintai density and bulk weight are about the same as ordinary silicate cement. Fineness ≥300m2/kg specific surface area or 45μm sieve residue ≤20%. Xintai aluminate cement is divided into four kinds: CA-50, CA-60, CA-70 and CA-80. It is stipulated that the setting time and strength of each age of each variety of cement cannot be lower than the standard. Its characteristics are fast hardening, high strength and high refractoriness. In the process of use, the product solidifies and cures quickly. 1d strength can reach more than 80% of high strength, mainly used in projects with urgent schedule, such as national defense, highway, special repair works, etc.

Xintai products hydration heat is large, exothermic concentration. 1 day release of heat of hydration accounted for 70% to 80% of the total, so that the internal temperature of concrete rise higher. Even if it is constructed under -10℃, aluminate cement can be hardened rapidly and can be used for winter construction projects... When used, it can also be used under ordinary hardening conditions. Since the cement stone does not contain tricalcium aluminate and calcium hydroxide and has high density, Xintai has strong resistance to sulfate corrosion. The product also has high heat resistance. If coarse and fine refractory aggregates (such as chromite, etc.) are used, it can be converted into heat-resistant concrete with a service temperature of 1300-1400℃. Another important point is that Xintai has a tendency to decline in its long-term strength and other properties, with long-term strength declining by 40% to 50%. Therefore, aluminate cement is not suitable for long-term load-bearing structures and high temperature and high humidity environment, engineering only for emergency military works (road and bridge construction), emergency repair works (socket, etc.), temporary works, preparation of heat-resistant concrete, etc. Xintai mixed with silicate cement or lime will not only produce instant solidification, but also crack or even destroy the concrete due to the formation of strong alkaline calcium aluminate hydrate.

The above article content we tell you friends about the basic overview of Xintai aluminate cement, if you do not understand it, then hurry to see it. That's all we have to say about this knowledge, hope it can help you.

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Basic overview of Xintai aluminate cement?

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