Seeing this title, I find it incredible that gypsum has such a role, ah, the original gypsum in the consumption of aerated bricks as a conditioner in the process of gas. It is a commonly used gelling material. Gypsum not only acts as a conditioner in the gas evolution process, but also improves the strength, shrinkage and frost resistance of products by participating in hydrothermal synthesis reaction. The consumption of gypsum in aerated brick mainly includes the following aspects:

　　，参与铝粉的发气反响，当有石膏存在时，同铝粉在与水反响时生成的氢氧化铝反响生成硫铝酸钙。因而，在某些加气砖(如水泥-矿渣-砂，水泥-砂)中，水泥中石膏被铝粉的反响耗费过多时，由于水泥中铝酸盐成分得不到石膏的抑止就可能发作快速凝结，这时应补充参加石膏。

　　Firstly, it participates in the gas reaction of aluminium powder. When gypsum exists, it reacts with aluminium hydroxide produced by aluminium powder when it reacts with water to form calcium sulphoaluminate. Therefore, in some aerated bricks (such as cement-slag-sand, cement-sand), gypsum in cement is consumed too much time by the reaction of aluminium powder. Because the aluminate component in cement can not be suppressed by gypsum, it may occur rapid condensation. At this time, gypsum should be supplemented.

　　第二，抑止石灰的消化，使其消化时间延长，并降低终消化温度。

　　Secondly, restrain the digestion of lime, prolong the digestion time and reduce the final digestion temperature.

　　第三，能够抑止水石榴子石的生成，从而使游离的铝离子进入CSH(I)中，其中局部转化为铝代托勃莫来石，而AI2O3自身也能促进CSH(I)向托勃莫来石转化，阻止其向硬硅钙石转化，因此强度进步，收缩值降低。

　　Thirdly, it can inhibit the formation of hydrogarnet, so that free aluminium ions can enter CSH (I), which is locally converted to Aluminium-substituted Tobra mullite, and AI2O3 itself can also promote the transformation of CSH (I) to Tobra mullite and prevent its transformation to anhydrite, so the strength improves and the shrinkage value decreases.

　　第四，进步坯体及制品的强度，改善收缩等性能。石膏在静停过程中的坯体内参与生成水化硫铝酸钙和C-S-H凝胶，使坯体强度进步。加强了坯体顺应蒸压时温差应力和湿差应力的才能。在蒸压过程中，石膏能够促进水热反响的停止，使CSH(I)向托勃莫来石转化。

　　Fourthly, the strength of green bodies and products should be improved, and the shrinkage property should be improved. The gypsum participates in the formation of hydrated calcium sulphoaluminate and C-S-H gel during the static shutdown process, so that the strength of the green body is improved. It strengthens the ability of temperature difference stress and wet difference stress when green body complies with autoclaving. In the autoclave process, gypsum can promote the stop of hydrothermal reaction and make CSH (I) transform to tobermorite.

　　看完上面的叙说您是不是明白了，石膏的作用真的很大，用处也是如此的宽广。

　　After reading the above narrative, do you understand that the role of gypsum is really great, and its use is so broad.