According to QYResearch Construction and Chemical Research Center recently released China polycarboxylate water-reducing agent investigation report concluded that concrete admixtures developed very fast after 2000. Currently updated third generation: lignin - naphthalene - polycarboxylic acid. Polycarboxylate water-reducing agent is a kind of new water-soluble polymer material with comb-like structure composed of polyether monomer with different molecular weight and various kinds of unsaturated carboxylic acid, sulfonic acid and amide monomer, so that the concrete has Good fluidity and thixotropy make the complex concrete construction process becomes simple and easy. Polycarboxylate water-reducing agent free of formaldehyde, ammonia and other harmful substances, the production process of environmental protection, environmental pollution, on behalf of the most advanced technology of concrete admixture products, concrete admixtures in the replacement products.
At present, polycarboxylate superplasticizer is divided into polyester (MPEG) and polyether (APEG / TPEG) two categories, polyether type PCE water reducing agent appears later, but from the beginning of 2008 production, application began, By the end of 2010 the market of polyether type PCE water-reducing agent has more than 50%, the development is very rapid, mainly due to polyether superplasticizer processing is simple, stable performance, relatively low technical requirements, application promotion and other factors contributed.
In the superplasticizer industry boom, polycarboxylate water-reducing agent production stability, sustained and rapid rise. In 2005, the domestic polycarboxylate water-reducing agent annual output of only 50,000 tons, to its output in 2009 has reached 1.2683 million tons, an increase of more than 24 times. At present, many large-scale projects, such as the Qinghai-Tibet Railway, the Hangzhou Bay Bridge, the Beijing Olympic Stadium Museum Project, the Three Gorges Project, the Capital International Airport expansion project, the Soviet Union, the development of large-scale high-speed railway construction, Through the large-scale use of polycarboxylate water-reducing agent, polycarboxylate water-reducing agent is gradually replacing the traditional naphthalene-based water-reducing agent products, as a water reduction The mainstream of the market. At the same time, polycarboxylate water-reducing agent is also facing the bottleneck of technological innovation.
As a new generation of high-performance additives, polycarboxylate water-reducing agent in the application of the railway project is increasing, the current large-scale high-speed railway construction all require the use of polycarboxylate water reducing agent. Since October 2012, the Ministry of Railways has been on the water-reducing agent production enterprises to certification. According to China's concrete network statistics, as of May 10, 2016, a total of 134 water-reducing agent production enterprises through the railway water-reducing agent product certification and product certification. The list of the top ten enterprises, there have been nine companies through the Ministry of Railways certification. The promotion of railway projects for the production and application of polycarboxylic acid has accumulated rich experience, but also for the comprehensive development of the market laid the foundation.
At present, the industry concentration is very low, workshop a lot of business, and some do the synthesis, and some only complex. With the popularity of room temperature technology, industry access threshold is also getting lower and lower. Product homogeneity more and more serious. However, such enterprises are not the level of technical strength, quality control is different. In particular, the stability of the product at room temperature is often weak. But for some of the product requirements are not high, the price is very sensitive to the concrete business, but also barely enough. After 2015, trapped in the domestic economic downturn, the terminal market downturn, upstream production capacity and other unfavorable factors, polycarboxylate water-reducing agent business in the last year's general sales decline, half of the enterprise in 2015 polycarboxylate water-reducing agent Sales have declined. But in the case of the overall economic downturn last year, as a polycarboxylate superplastic agent rookie business, Jiangsu, China Railway Ao Leite against the wind, to achieve a steady growth in sales, among the top ten list. Domestic commodity concrete market is saturated, but the subway and highway, marine concrete is still in high-speed construction, while industry net profit is low (only about 10%), some small workshops business face with great pressure, the industry is also facing Re-shuffle the situation. However, foreign markets, especially other countries in Asia and Africa are high-speed construction period, there is a big potential for development, so the export of water-reducing agent business there are still many opportunities.
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