... (for example:coal ash,sand,stone dust and others ),through making the material small for example sand,they can be used ... light brick,the porous rate is 70-80%. 3. ADVANTAGES AAC block density is usually 400-700kg/m3,(according the market in ... the material and cost,it also fighting shaking. keeping temperature aac block has many are porous,the delivery hearting coefficient is 0 ...