... Advantages:1) Light Weight and high strength, 2) Fine insulation material and heat preservation, 3) Excellent sound inslulation, 4) Fireproof 5 ... .Advantages:1) Light Weight and high strength,2) Fine insulation material and heat preservation,3) Excellent sound inslulation,4) Fireproof5) Last ... ,600kg/m3,700kg/m3.It has not the big grain,main use silicon material (for example:coal ash,sand,stone dust and ...