Superfine cement 
 DMFC-600/800 
 The fine cement is a new generation of fine grinding of special equipment from the rigid inorganic ultrafine material, the use of ultrafine cement and then add other admixtures, admixture mixing from the slurry can be used for reinforcement strengthening works perfusion operations. Ultra-fine cement grout, coal reinforcement grouting fine cement, fine cement reinforcement grouting, consolidation grouting, well reinforced cement, fine cement, 
 Advantages 
 , Ultrafine cement material is non-toxic, tasteless, groundwater and pollution to the environment, is environmentally friendly materials. 
 2, fine cement with admixture, additives, stirring from the slurry curing shrinkage, stones, high strength, good durability, not aging, good impermeability. 
 3, the specific surface area of ??ultrafine cement materials in more than 600 m 2 / kg (800 m 2 / kg), with an average particle size of less than 10μm, can the slurry flow, and thus its stability and irrigation. 
 Range of applications 
 A. Water conservancy projects in the dam body and crack grouting of dam foundation; 
 Two. Pouring underground water curtain to cut off penetration of water, the overall impermeability plugging; 
 3. Reinforce and improve the strength of soft soil and rock mechanics, repair of concrete structures, and restore its integrity; 
 4. Correct the dam led to the formation of instability caused by differential settlement and cracking of high-rise buildings, tilt; 
 5 Complement pulp reinforcement of roads, bridges, airport runways, ground subsidence; 
 6. A variety of underground structure excavation pretreatment and geological drilling in complex stratigraphic drilling in the retaining hole solid wall, the only Bay plugging and other projects; 
 7. Complex formation quicksand layer fixation and consolidation of the silt layer. 
 Technical indicators 
 Performance indicators (DMFC-600) 
 Appearance: gray powder 
 Specific gravity: 3Kg/dm3 
 Odor: no 
 Toxicity: 
 Specific surface area: ≧ 600m2/kg 
 The median particle size of the D50: ≦ 10μm 
 Performance indicators (DMFC-800) 
 Appearance: gray powder 
 Specific gravity: 3Kg/dm3 
 Odor: no 
 Toxicity: 
 Specific surface area: ≧ 800m2/kg 
 The median particle size of the D50: ≦ 5μm 
 Performance under standard test conditions 
 Setting time: the initial setting 2h; the final setting of 8h 
 Flexural strength: 3d, 8.5MPa; 28d, 11.2MPa 
 : 3d, compressive strength of 41.1MPa; 28d, 62.1MPa 
 Note: with the cement slurry fluidity, permeability increases with the water-cement ratio increases, the setting time is extended with the water-cement ratio increases, the intensity decrease with increasing water-cement ratio, so to meet the construction requirements under the premise should be to minimize the water-cement ratio. 
 Packaging and storage 
 Plastic woven bag, net weight 25 kg / bag, shelf life of 6 months; 
 Be stored in a dry and ventilated room, sealed bags, pay attention to moisture, frost. 
 Use 
 1, the product is generally not recommended directly for grouting operations alone should admixture and the admixture is added before use. 
 2, for different size of the gap space. Geological environment of the different soil, different grout conditions, different strength indicators to determine the suitability of the water-cement ratio (usually the grouting Division's range of water-cement ratio of 0.1-4.0MPa), must use an electric mixer for mixing at least five minutes, until uniform. 
 3, using a manual or electric cement grouting equipment, grouting operations, the grouting pressure within a certain range (usually in the range of 0.1-0.5MPa. Different basic conditions for different water-cement ratio, the required injection pressure. injection pressure is too large, may be the formation of splitting grouting, can not penetrate evenly. grouting pressure is too small, you can not penetrate to the tiny space).