Surprisingly, gypsum still has this function. The original gypsum played a regulating role in the production of aerated brick. It is a commonly used cementing material. Gypsum not only acts as a regulator of gas process, but also can improve the strength, shrinkage and frost resistance of products by participating in hydrothermal synthesis reaction. Gypsum in the production of aerated brick mainly has the following aspects:
Firstly, it is necessary to participate in the gas reaction of aluminium powder. When gypsum exists, it reacts with aluminium powder to form aluminium hydroxide in water to form calcium aluminate sulfate. Therefore, in some aerated bricks (such as cement-slag sand, cement sand), when gypsum consumes too much aluminium powder in cement, the rapid setting may be due to the lack of inhibition of Chalate cement gypsum, gypsum should be added.
Secondly, it restrains the digestion of lime, prolongs its digestion time and lowers its final digestion temperature.
Thirdly, the formation of hydrogarnet can be inhibited, so that free aluminium ions can enter CSH (I), some of which can be converted into aluminium-substituted tobermorite, while AI2O3 itself can also promote the transformation of CSH (I) to tobermorite and prevent its transformation to anhydrite, thus increasing its strength and decreasing its shrinkage value.
Fourthly, the strength and shrinkage of green bodies and products should be improved. The gypsum participates in the formation of hydrated calcium sulphoaluminate and C-S-H gel during the static shutdown process, so as to increase the strength of the green body. It enhances the ability of green body to adapt to temperature and humidity differential stresses during autoclaving. In the autoclave process, gypsum can promote hydrothermal reaction and make CSH (I) transform to tobermorite.
Read the above narrative, you do not understand, the role of gypsum is really great, the use of a wide range. If you need Jinan gypsum powder, you can click on the official website to consult: http://www.rare6.com/