... block making machine 1.potential industry in the future 2.low invest,high profit 3.professional manufacturer,good service AAC Block ... use silicon material (for example:coal ash,sand,stone dust and others ),through making the material ... the porous rate is 70-80%.3.AAC block Advantages light weight Areated concrete density is ... are porous,the delivery hearting coefficient is 0.9-0.22W/(mk),the same as 1/ ...