Aerated brick It is a new type of lightweight and porous building material with the advantages of light weight, good heat preservation, processability and non combustion. With siliceous materials (sand Fly ash And siliceous tailings) and calcareous materials（ lime 、 cement ）As the main raw material, air entraining agent is added（ Aluminium powder ）The lightweight porous silicate products are made through the process of batching, mixing, pouring, pre curing, cutting, autoclaving, curing, etc. It is called gas dispensing because it contains a large number of uniform and small pores after gas generation concrete 。 It can be made into blocks of different specifications board And thermal insulation products, which are widely used in load-bearing or enclosure filling structures of industrial and civil buildings, have received widespread attention from the construction industry around the world and become a building material vigorously promoted and developed in many countries. The advantages of aerated brick are as follows: 1. Light weight (the general weight of aerated concrete block is 500-700kg/m3, only equivalent to Clay brick 1/4-1/5, 1/5 of ordinary concrete, is the lighter type of concrete. The deadweight of buildings with ordinary brick concrete structure is reduced by more than 40%). 2. Good thermal insulation performance (the thermal conductivity of aerated concrete is 1/6 of that of ordinary concrete, and the thermal insulation performance is much better than that of 240mm thick clay brick wall ）。 3. Strong anti-seismic capacity (aerated concrete has certain anti-seismic capacity because of its light capacity, good overall performance and small inertia force during earthquake). 4. Good processing performance (aerated concrete has good processing performance, which can be sawed, planed, nailed, milled and drilled, bringing great convenience and flexibility to the construction). 5. It has a certain high temperature resistance (when the temperature of aerated concrete is below 600 degrees, its compressive strength slightly increases; when the temperature is about 600 degrees, its compressive strength is close to the compressive strength at room temperature, and its fire resistance meets the national first-class fire protection standard). 6. Good sound insulation performance (like bread, the internal structure of aerated concrete is evenly distributed with a large number of closed pores, so it has sound absorption performance that ordinary building materials do not have). 7. Strong adaptability (it can be customized according to different local raw materials and conditions. The raw materials can be river sand, fly ash, ore sand, etc., which can be adapted to local conditions. It can be used as waste, beneficial to environmental protection, and truly turn waste into treasure).