The influence of silica fume on high strength grouting material

High strength grouting material high strength grouting material manufacturer silicon ash particles is small, high strength grouting material price than large area, high purity sio2, high ash activity, such as physical and chemical characteristics, the silica fume as mineral plus the seam an agent to join CGM high-strength grouting material, the performance of CGM high-strength grouting material can produce a variety of good effect. Amorphous and very fine silica fume tier performance CGM high-strength grouting material beneficial effects both in physical and chemical performance; The role of superfine fillings; In the early hydration process of crystal nucleus role, and have high ash activity. 1, accelerate the hydration of gelled material system with alternative after weight of cement, silica fume system 3 d and 7 d hydration exothermic increase greatly. The need to control early hydration exothermic grouting material engineering in selecting materials should pay special attention to this point. 2, improve the CGM high-strength grouting material strength when the silicon ash and water reducing the seam an agent when in use, can make the water glue of grouting material gradient to low, between cement particles is filled with silica fume is close-grained, improve the compressive strength. 'Research has shown that high yield of silica fume, CGM high-strength grouting material later strength has a downward trend. Silica fume CGM high-strength grouting material good early strength, commonly used in the repair engineering/top and a mine, wear-resisting, corrosion resistance and other special project. To use the silica fume improve hydraulic impact strength. 3, increase the density of silicon ash particles is very small, can fill in the pore between cement particles. Particles close packing, can reduce bleeding and reduce the average aperture wool stoma, and to reduce water demand. Silicon ash content at 5% ~ 10%, can obtain good mixing effect. 4, the improvement of high strength grouting material segregation and bleeding performance - After pouring concrete, tend to produce the phenomenon of water separated from the high strength grouting material, is formed in the surface water film, also called floating pulp, the uneven distribution of upper high strength grouting material, affect construction quality. The more silicon ash mortar, grout material material difficulty segregation and bleeding. When replace rate of 15%, grouting material slump even reach 15 ~ 20 cm, also almost do not produce segregation and bleeding; When replace rate of 20% ~ 30%, the grouting material is unfavorable also produce segregation in the tap water directly. Because of silica fume on the properties of grouting material segregation and bleeding, the doped silicon ash grouting material can be used as a seaport, tunnels and other underwater engineering. 5, improve the permeability resistance of high strength grouting material and resistance to chemical corrosion resistance, the mixed with silica fume can improve the compactness of grouting material, greatly reducing the high strength grouting material, effectively prevent the acid ion intrusion and corrosion effect, improve the permeability of silica fume grouting material performance, resistance to chemical corrosion resistance, but also to steel bar corrosion resistance are improved.