... such as construction, metallurgy, chemical industry, light industry, machinery, electric power, petroleum, environment protection communication, transportation and horticulture.Main ... and tunnel, also wall and ceiling in the public.4.Metallurgy: steel frame cladding materials, removal of slag when ... Water absorption(%) Thermal conductivity (k·m2·h·°C) Impurity(%) 4-8mm 70-110 480 0.045 3 2-4mm 80 ...