TD-DM fine cement "Extension of the brand" ultrafine cement (hereinafter referred to as TD-DM) is developed by the Extension of Building Materials Co. produced an ideal high-performance cement-based grouting material ultra-fine particles, it has organic chemistry grouting like a good liquid permeability and groutability, it has a higher strength and durability, and with environmental protection, pollution on the surrounding environment. TD-DM basis for building complex geological environment soil reinforcement, structural reinforcement of buildings, buildings waterproof plugging grouting, foundation reinforcement of large equipment and other projects. According to different requirements, TD-DM is divided into two types: TD-DM7000 and TD-DM8000 type. TD-DM7000 type specific surface ≥7000cm2 / g, an average particle diameter of about 5 ~ 10μm, generally suitable for filling fine space. TD-DM8000 type specific surface ≥8500cm2 / g, the average particle size 0.2μm, maximum particle size of <20μm, more suitable for fine space filling. I. Features: 1, efficiency and reliability TD-DM is a high-performance ultra-fine cement grout material from the inorganic ultrafine particle composition, which has good permeability and groutability, more grout than organic chemistry high strength and durability, there is no aging. Thus TD-DM is applicable to a variety of soil environments foundation reinforcement, curing the sand layer, a variety of complex foundation reinforcement, grouting complex structures such as tunnels, subways, dams, highways, piers, oil, large equipment base ...... and so on. 2, safety and no pollution of the TD-DM by the non-toxic inorganic materials, its chemical composition determines its water, soil, air and other ambient pollution, compared to other filling materials, has a higher security sex, is the green environment-friendly building materials. 3, high convenience economy TD-DM construction, easy to operate, and the price is cheaper than organic chemistry grout, grout is not aging, good durability, applicable to any kind of grouting equipment, can be used either Grain filling grouting construction method, which has a higher economy. Second, product use: TD-DM can be widely applied to various types of building foundation reinforcement works, structural repair and strengthening works, waterproof plugging grouting works, equipment foundation reinforcement projects. Especially for filling slight space, the curing strength requirements higher grouting process to better reflect its excellent performance. 1. Deep Foundation plugging groundwater flow; 2. dam foundation reinforcement and filling the dam cracking cracks; 3. subway or tunnel walls grouting or repair; 4 large or tall buildings foundation reinforcement; 5. road-based grouting; 6. pools, basement waterproofing plugging grouting; subsoil 7. Excavation subways, tunnels, mines and other underground works when filling the curing process, in order to reduce the difficulty of the excavation, speed up, improve work efficiency; 8. curing sand layer. 9. bolt and large equipment base of secondary grouting; 10. anchorage. Because TD-DM7000 and TD-DM8000 different particle size, scope and usage are different, TD-DM7000 apply ∮≥0.2mm interstitial spaces, water-cement ratio adjustment range of 0.3 ~ 1.0; TD-DM8000 apply ∮≥0.02 Geological fine sand and silt filling the gap space or ∮≥0.1mm mm, the water-cement ratio adjustment range of 1.0 to 5.0 construction method. For interstitial spaces of different sizes, different soil geological environment, different grout conditions, different intensity target, you can first determine the use of TD-DM7000 or TD-DM8000. Usually a relatively large part of the gap space (∮≥0.2mm) or particle size is relatively large coarse sand layer (∮ = about 0.5mm) filling, the choice of TD-DM7000; while the gap space is relatively small (0.2 When mm≥∮≥0.02mm) areas or smaller particle size of sand and silt layer (∮ = about 0.1mm) filling, the choice of TD-DM8000. 2. Adjust the appropriate water-cement ratio (usually TD-DM7000 adjustment range is 0.4 ~ 2.0, TD-DM8000 is adjusted in the range of 1.0 to 5.0), with an electric disperser stirring until a uniform paste composition, and then the slurry grout was poured into the bucket. 3. The duct mouth filling machine fixed in advance in filling the mouth and on the basis of fixed docking, filling machine is turned on the power, open the valve grouting, pay attention to control the grouting pressure within a certain range. (Usually in the range of 0.1 ~ 0.5MPa Different basic conditions, different water-cement ratio, required different grouting pressure. Grouting pressure is too large, the formation of split grouting may cause can not be uniform penetration. Filling pressure is too small, it may can not penetrate to the fine space.) 4. Upon completion of the closure grouting hole filling. 5. When filling area is large, it can be segmented grouting. Packaging and storage using plastic bags packaging, specifications for 40㎏ / bag or 50kg / bag. Products should be stored in a cool dry place, not damp, unopened product shelf life is 12 months.