This paper analyzes the development course of building waterproof materials in China

China Paint Network
News: Since the 1980s, China's construction waterproof industry has been a rapid development, in the construction waterproof industry manufacturers and experts and scholars efforts, China's building waterproof products have formed a complete range, full-grade performance of the material system.
the following six categories of China's building waterproof materials for many years of development.
, emulsified asphalt waterproof material. It includes anion emulsified asphalt
coating
, non-ion emulsified asphalt coating, cation emulsified asphalt coating, rubber modified emulsified asphalt coating and so on. It is China's first
waterproof
, it has low prices, easy access to raw materials, easy to produce characteristics. Its disadvantages are large odor, toxic, easy to aging failure, has been gradually withdrawn from waterproof construction projects.
II, polyurethane-type two-component waterproof coating, which includes tar polyurethane double-component waterproof coating and non-tar polyurethane two-component waterproof coating, it is China's second generation waterproof coating, improve the emulsified asphalt waterproof coating easy to aging failure shortcomings, waterproof life increased to more than 8-10 years. Its disadvantage is that it smells big and poisonous. Non-tar polyurethane two-component waterproof coating with epoxy resin to replace tar, reduce odor, improve waterproof life, but the benzene organic solvent still exists, there is still a carcinogenic risk to the human body. In addition, polyurethane monomer is in the construction with the trigger to produce a polymer organic polymer, and mixed with the bone and other materials to form a layer of water-insulated, breathable waterproof layer, so the construction conditions, ambient temperature and other waterproof layer of the shape of the war has a greater impact, easy to cause the waterproof layer waterproof performance is uneven.
, JS type two-part waterproof coating type two-part waterproof coating is also known as cement-based acrylic waterproof coating. It is the polymer reaction of good acrylic emulsion and cement base powder proportionally reconcile into a coating, instant construction of waterproof material, it is China's third generation waterproof coating, it is a
water-based coating
so it is the polymer cement coating in the least volatile organic matter, reached the national environmental standards, it can be caused by wet substrate construction, to the construction of convenience. Its disadvantage is that the waterproof layer is not well bonded with the base layer or protective layer, but it is difficult to repair the fine hair but damage or failure. As an organic ester high-polymer, cement is alkaline, has the effect of promoting saponification decomposition, affecting waterproof life, so its waterproof layer life is slightly lower than non-tar-type polyurethane waterproof coatings.
IV, lotus-type waterproof material, which is a class of silicone, fluorine-containing non-ion surfactants and other liquid waterproof materials, foreign countries are usually used in cement pavements, bridges and other field winter waterproof and crack-resistant short-term protection. Spraying this kind of waterproofing agent on the base surface of cement building, when the substing absorbs the waterproofing agent, its surface and capillary hole strain becomes smaller, when the water is attached to the surface, the formation of lotus leaf effect, not directly absorbed by the base surface, thus playing a waterproof effect, is an extremely convenient waterproofing agent, so some people use it on the wall Waterproofing this kind of waterproof agent sprayed on the substing, attached to the solid surface, capillary pores and fissures, and solids did not directly combine, with the extension of time, it on the one hand to the solid internal drift, on the other hand, it is water dissolved loss, gradually failed, so it is a short-term effect of waterproofing agent. It has low impermeable pressure and is not suitable for waterproofing the ground with water.
, cement-based osmosis crystalline waterproof coating, it is China's fourth generation waterproof coating, which is a waterproof coating consistent with concrete, its waterproof life is comparable to concrete, the same as concrete. It is non-toxic, tasteless, pollution-free, is a kind of green environmental protection material, it is through the active components in the formula, under the role of water, in the cement substrate capillary channels and fissures permeation diffusion, and free calcium ions and other interactions to produce insoluble in the water branch cranberry crystallization, in the capillary channel and fissures in the water expansion, so that the structure of the capillary channels and fissures filled with dense, so as to achieve the purpose of water blocking. That's why it also has the self-healing function of creating fissures afterwards. The waterproof layer of cement-based osmosis crystalline waterproof coating has the same high pressure strength and folding strength as cement mortar, the pressure of the solid surface is consistent with the mud, has the breathing function, solves the problem of water condensation and stripping of the bonding interface, the coating surface bonding performance is good, suitable for the veneer brick, it appears, solves the problem of wall waterproofing. Its disadvantages are poor maintenance or easy cracking under the action of grass-roots stress.
, the overall crystalline waterproof material; The overall crystalline waterproof material is added on the basis of cement base osmosis crystalline waterproof material in the cement hydration, condensation, hardening process of homogenization, water preservation, plasticization and absorbent water expansion blocking capillary channels and fissures, so the shrinkage rate of cement decreased by more than 85%, the yield of fine cracks decreased by more than 70%, waterproof performance greatly improved, thus completely solving the cement-based osmosis waterproof coating under the grass-roots stress. The waterproof layer parameters formed by this kind of waterproof anti-permeable agent are similar to those of cement products, its waterproof mechanism is the principle of permeable crystallization and dispersion crystallization, in concrete components, cement mortar layer and coating waterproof layer, through osmosis, dispersion, migration, in the capillary channels and fissures to form water-absorbing insoluble crystallization, filling the dense capillary channel and cracking, the active components can also absorb water. Body, it can absorb water in the process of cement hydration, condensation, hardening, significantly reduce the water rate, reduce the capillary channel formed by the water, block capillary channels and fissures, increase the plasticity of cement condensation and hardening process, reduce cement shrinking seams, increase the affinity between cement and sandstone fabric, improve the homogenization of mixing materials, fluidization, reduce stratification, sink defects, thus forming a dense overall waterproofing.
the waterproof layer is similar to the substring parameters, it is suitable for waterproofing on the surface and back of the water, without shadowing the split. It does not contain volatile or decomposable toxic substances, so tasteless, non-toxic, pollution-free, is a green and environmentally friendly products. Theoretically, the whole crystalline waterproof material belongs to the rigid waterproof category, but in fact it is a combination of soft waterproof material. Its base and surface layer are rigid, but the flexible treatment is used in the node and deformation area, and this intelligent waterproofing method completely solves the problem of concrete mortar seepage, leakage and cracking.