Expansion of ultra-fine cement 
 Model: DMFC-E-600/700/800/900/1100/1200 
 Products 
 The expansion of ultra-fine cement is ordinary portland cement to join the expanding admixture and polymer additives, fine grinding of special equipment from the new generation of rigid inorganic ultrafine materials. According to the different specific surface area, divided into 600, 700, 800, 900, 1000, 1100 and 1200. Expansive cement, the expansion of ultra-fine cement, fine cement grout, coal ultrafine cement reinforced. 
 Features 
 An expansion of ultra-fine cement specific surface area ≥ 600 m 2 / kg, with an average particle size of ≤ 10μm slurry fluidity, high stability and irrigation can perfusion 0.2 ~ 0.02mm fine cracks. 
 2, due to the role of the expansive agent, paste stones rate, analysis of water is small, and micro-expansion of the hardened paste fill more dense rock crevice. 
 3, due to the role of polymer additives, paste stones high strength, good durability, plugging, good impermeability. 
 4, the expansion of the fine cement is non-toxic, odorless, non-polluting, and is environmentally friendly materials. 
 Range of applications 
 A. Water conservancy dam foundation reinforcement and dam cracks grouting; 
 Two. Subway or tunnel wall grouting reinforcement water shut off or repair; 
 3. Reinforce and improve the strength of soft soil and rock mechanics, and repair of concrete structures to 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. The 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 
 Expansion of the fine cement performance indicators: 
 Model 
 Index 

 Degree of fineness 
 M / kg, setting time 
 min flexural strength 
 MPa compressive strength 
 MPa expansion X 
 % 
 Initial setting of the final setting of 3d 28d 3d 28d 1d 28d 
 The DMFC-E-600 ≥ 600 ≥ 45 ≤ 360 ≥ 4.0 ≥ 6.5 ≥ 21 ≥ 42.5 ≥ 0.15 1.2 ≥ X-≥ 0.35 
 The DMFC-E-800 ≥ 800 ≥ 45 ≤ 360 ≥ 4.0 ≥ 6.5 ≥ 21 ≥ 42.5 ≥ 0.15 1.2 ≥ X-≥ 0.35 
 The expansion ultrafine cement strength increases with the water-cement ratio, to minimize the water-cement ratio should be under the premise that to achieve the requirements of the groutability. Proposed to add one percent for the GC1 admixtures used to improve fluidity, extension of a perfusion time of reducing the water-cement ratio. 
 Note 
 1, the slurry after mixing with water, the storage time is best not more than 20 minutes otherwise adversely affect will slurry sclerosis strength. 
 The expansion ultrafine cement strength increases with the water-cement ratio, to minimize the water-cement ratio should be under the premise that to achieve the requirements of the groutability. 
 Thickening of the slurry, in principle, have to add water dilution. 
 Packaging and storage 
 Paper-plastic composite bag, net weight 25 kg / bag, shelf life of 6 months; 
 Shall be stored in dry and ventilated indoor sealed bag, pay attention to moisture, frost.