Application of inororore waterproof coatings

China Coatings Online News Information: In the organic waterproof coating development at the same time, inorganic waterproof coating is also developing. At present, inorance waterproof coating is becoming a hot research topic, inorance waterproof coating is not only cheap, and no public hazards, is one of the focus of the development of environmentally friendly materials in the 21st century. Inororal waterproof coating mainly sub-coating covering waterproof and permeable crystalline waterproof coating two kinds.
coating covering waterproof coating is generally cement-based powder waterproof coating, with water hard performance, such as ensure time (COPROX), waterproof treasure, M1500, HM1500, TM1500 and so on. To ensure that the waterproof mechanism of waterproof treasure is cement as the main bonding material, which film, water repugnance components, etc. under the action of the catalyst, together with cement, together on the surface of the substrate to form a structurally dense film, closed surface cracks, pores, thus blocking the water channel; This kind of waterproof material is cold construction, the construction surface requirements are not high, as long as the surface is oil-free, sticky dust, loose matter can be, wet substation construction, the surface is fully moist, otherwise the dry coating will powder or fall off. This waterproof material is non-toxic and tasteless, has a certain alkali resistance, anti-aging properties, so it is used in many projects. However, such waterproof material is limited to surface treatment, non-reactive behavior between the substate, only on the surface of the formation of water-repugnant film layer, so the repair and enhancement of the substation is weak, the defects existing inside the concrete is powerless, for some connected pores, cracks and treatment of the specimen, the coating damage will seriously affect impermeability performance; When the wet content of the building wall is too large and the water vapor can not escape, it will still cause the water content of concrete to be too high, destroying the internal structure of the building. Therefore, on the basis of inorge rigid waterproof coating research, a permeable, reactive osmotic crystalline waterproof coating appeared on the substring.
M1500, HM1500, TM1500 and other products are made of inororated water-based silicate as a carrier (mostly water glass), with the appropriate amount of catalysts, dispersants, additives and water and other composite colorless translucent liquid, with high permeability Directly sprayed on the surface of cement mortar and concrete structures, it can quickly penetrate into the interior and react with Ca(OH)2 produced by cement hydration to produce silicates that are insoluble in water and have a certain strength, thus blocking internal pores, closing pore passages, and improving the impermeability of concrete. This kind of material is characterized by a one-time waterproof anti-permeability effect is very good, but does not have self-healing, once the concrete cracks again, there will be leakage.
Cement-based osmotic crystalline waterproof material is a new type of waterproof material developed abroad on the basis of penetration and reaction thought, is based on silicate cement, quartz sand, etc., composed of active chemicals, can be used as waterproof coating, can also be directly incorporated into concrete to form the body structure waterproof. It is the same as the M1500 through the reaction to block the internal pores, closed capillary channels, improve the anti-permeability of concrete, but the improvement is that it uses a catalytic substance, activated by water, can promote cement to produce new crystals, when new fine gaps in the concrete, once there is water seepage, and will produce new crystals to block water, so has the ability to self-healing. Cement-based osmosis crystalline waterproof coatings have made rapid progress abroad, from the early German VANDEX (steady water) brand (now resold to Switzerland) to develop Canada's XYPEX (Cypress), Canada's KRYSTOL, Singapore's FORMDEX (water-proof), the United States PENETRON (Pennechuan), France's DIPSEC, Australia's CRYSTAL, Japan's PANDEX and dozens of other brands, have been improved to varying degrees.
cement-based osmosis crystalline waterproof material in the process of pioneering engineering applications, initially advocated for waterproofing the inner surface of the structure, especially in sewage treatment tanks and surface water storage tanks and other similar projects in the application is ideal. Since the 60's, cement-based osmosis crystalline waterproof coating, as an effective method of waterproof treatment (inner waterproofing method) of concrete structure back water surface, has gradually expanded its variety and entered new fields of construction application. Now, cement-based osmosis crystalline waterproof materials are widely used in underground structures, underground railways, bridge pavements, drinking water plants, sewage treatment plants, hydroelectric power stations, nuclear power plants, water conservancy projects, etc. because of their impermeable properties, strong bonding force, anti-reinforced corrosion, and the characteristics of harmless and easy construction for human beings.
introduced cement-based osmosis crystalline waterproof material in the 1980s and began to be applied to Shanghai subway project. In the mid-1990s, some agents began to distribute products from the United States, Canada, Australia and other countries, or from abroad to provide master meat in domestic processing and production, the core part of the production is still blank. For this kind of products, at present, some domestic units such as Wuhan University of Technology has been successfully developed.