There are the general types : SF-95,SF-92,SF-90,SF-85 Density: 300-450kg/CBM 40HQ: 25Ton Packing: 500kg/CBM ; Density: 300-450kg/CBM 40HQ: 25Ton Packing : 600kg/CBM; Density: 600-700kg/CBM 20GP:18-20Ton Packing : 1000kg/CBM. Microsilica fume average 0.1-0.15 μm in diameter, the size of several cement average 1.0%. Surface area for the 15-27 m 2 / g, with strong surface activity. Function: Dense castables Improved flow Hot strength Strength during heat-up
