... a light and porous building material. It is based on cement, lime, slag, fly ash, and sand. Aerated concrete ... ). Aluminium powder: activated aluminium content, more than 90%.(4). Cement: 32.5R bulk cement.(5). Sand: SiO2 content, more than 85%; Clay content ... .Main technical data: (1). Finished products: 600KG/m3;(2). Proportion: cement, 8%; Quicklime, 19%; sand, 70%; Gypsum, 3%; aluminium powder, ...