... )3.3 Quicklime, phosphor gypsum, aluminum powder(obtained at local).3.Water, electric, steam supplied3.1 Water ... s republic of China4.1 Density grade:500, 600,700kg/m³.(3.5,5.0,7.5 ... heat insulation qualityThe coefficient of heat conductivity is at 1/6 of common concrete. The heat insulation ... strength of the aac brick will be increased. At 600°C, the compression strength will approach its normal ...