加气混凝土是通过加入发泡剂发泡使之成为轻质多孔的建筑材料.但是单靠加入发泡剂而不稳定发泡过程是不够的.这是因为,加气混凝土料浆在发气之前是固—液两相体系,当铝粉与料浆中的碱性物质发生化学作用产生大量气泡,氢气被这一层液体薄膜所包围,薄膜破裂时,气体从中逸出,此时料浆就变成了固——液——气三相体系. Aerated concrete is foamed by the addition of a foaming agent to make it a lightweight, porous building material. However, the unstable foaming process is not sufficient simply by adding a foaming agent. This is because the aerated concrete slurry is generating air. Before the solid-liquid two-phase system, when the aluminum powder and the alkaline substance in the slurry chemically reacted to generate a large number of bubbles, hydrogen is surrounded by this layer of liquid film. When the film ruptures, the gas escapes from the slurry. It becomes a solid-liquid-air three-phase system.