The development history of high-strength non-shrink grout material - Silver epoxy resin grouting material

High-strength non-shrink grout high-strength non-shrinkage grouting material construction technology of high-strength non-shrink grout material performance of high-strength non-shrink grout material history can be roughly divided into three stages, namely the start stage, developing stage and stable stage of development. Early stage of our country high strength non-shrinkage grouting material and the development and application of seam an agent started almost synchronization is the kingdom and the United States.       30 s of the twentieth century, Shanghai has a gas high-strength non-shrink grout material production and application, the use of aerated beauty seam an agent is aluminum powder. The late 40 s, our country started using air-entraining beauty in harbor grouting material seam an agent. In 1950, when heavy industry in north China ceramics company is main raw material with rosin rosin hot polymer air-entraining beautiful seam an agent, its performance than the United States of 'sand resin', in the wuhan Yangtze river bridge, the yongding river gate repair, such as the Buddha hill reservoir dam grouting material in engineering application.       In 1952, the ministry of railways has been developed by the relevant units concentrate and sulfite reed pulp waste liquid of alcohol waste liquid concentrate. 1956, when the country is built appoint issued the cement concrete mixed with air-entraining beautiful seam an agent of the interim provisions on. In 1957, the ministry of railways publishing house published the first grouting material with good seam an agent on the plasticizing the seam an agent and its application in the concrete and mortar.       In the 1950 s in China is widely used in calcium chloride and sodium chloride as early strength beautiful seam an agent, but limited to the technical level, application technology, on the use of plus the seam an agent there have been some problems, cause and application of the seam an agent about many negative impacts. Such as a large number of reinforcement corrosion problem caused by the use of calcium chloride, because of the bleed air strength of grouting material loss caused by the seam an agent quality, wood calcium content is too large and cause the concrete problems such as long time not condense sclerosis. High-strength non-shrinkage grouting material construction technology of changchun zhongxin grouting material in 60 ~ 70 s for a period of time of research and application of grouting material and beautiful seam an agent stagnate, some procedures and specifications and even made the limit the terms of the grouting material and beautiful seam an agent to use. However, in the late 60 s, 70 s or some valuable research achievements and beautiful seam an agent. As in 1966, at the institute of mechanics, Chinese Academy of Sciences developed with triethanolamine trace organic materials and inorganic composite materials in line with the early strength of the seam an agent and jet grouting material beauty with quick-setting agent ( Red star type I quick-setting seam an agent) And so on.       High-performance high-strength non-shrink grout material and beautiful seam an agent market will gradually become the main product type graft copolymerization of poly (carboxylic acid and beautiful seam an agent, its superior performance has been gradually known by people. At present, this kind of new type of high-performance high-strength non-shrink grout material mixed with the main application in our country some big bridge engineering, hydraulic engineering, tunnel engineering, and production of the earth industrial and civil construction grouting material, BY series grouting material application of poly (carboxylic acid plus a proportion of the seam an agent was small.       Clean production, no 'three wastes', is also poly carboxylic acid is an important characteristic of water reducing the seam an agent, in line with the ongoing environmental protection, energy conservation and sustainable development of the national policy. To graft has held true in China plus the seam an agent production factory is not much, most manufacturers are made of imported graft copolymer after processing into the market. Technical content is not high, therefore, combined with the matrix itself is not very excellent performance, so the products entering the market competitiveness is not strong. From high-strength non-shrink grout material plus the seam an agent research perspective, graft copolymerization is the only way. Expand the application of graft copolymerization sex grouting material and beautiful seam an agent is the key to application of technology to keep up, product line can be stable. ​