Aerated concrete modified lime as well as preparation method and application thereof

The invention provides aerated concrete modified lime as well as a preparation method and application thereof. The modified lime provided by the invention is medium-low-speed slaked lime powder obtained by crushing quick slaked lime and dihydrate desulfurized gypsum through a dry method, and the microstructure of the modified lime is that the surface of the quick slaked lime powder is uniformly coated with a layer of semi-hydrated gypsum. When the modified lime is used for preparing the aerated concrete, through the corrosion inhibition effect of the gypsum, centralized decomposition and heat release of the lime can be delayed, and stable gas generation of the aluminum paste is achieved; and the phenomenon that the aerated concrete blank sinks or collapses due to the fact that the castable slurry is rapidly aerated and is not synchronous with the thickening of the slurry is avoided. Besides, due to the fact that lime digestion and centralized heat release in the early pouring gas forming stage are avoided in