Henan Superior Abrasives - High Quality Silicon Carbide and Silica Fume Supplier

1. Thickness and rebound loss of bond damage The incorporation of silica fume in shotcrete can improve the adhesion to the bonded surface and the cohesion within the shotcrete; thus the thickness of shotcrete on the top and vertical surfaces can be greatly increased. In the study of wet mix shotcrete , if not mixed with silica fume, the top surface of the bond damage thickness of 90 mm; if mixed with compacted low-density silica fume, the maximum value of up to 280 mm. the top surface of the bond damage thickness is generally greater in dry mix shotcrete, if mixed with non-compacted silica fume, the maximum value of dry mix shotcrete up to 380 mm, while the top surface of dry mix shotcrete without silica fume The top surface rebound of dry shotcrete is 42.7% for shotcrete without silica fume, which can be reduced to 21.4% with the addition of silica fume. The amount of springback on the vertical surface: 45.5% for shotcrete without silica fume; can be reduced to 22.8% with the additio...