Speaking of the “hero behind the scenes” of the concrete industry, we have to mention concrete admixtures. It is one of the most important raw materials in concrete. It can not only improve the workability, physical and mechanical properties and durability of concrete, but also ensure the safety and long-term service performance of concrete. It is also a green, environmentally friendly and low-carbon product. Since its birth in the 1930s, it has experienced the development process of polycarboxylic acid superplasticizers from the use of lignin, naphthalene, etc. to the present. It can be said that the support of the concrete industry in the field of construction is inseparable from the renewal and iteration of admixtures.
In recent years, China's research on concrete admixtures has become more and more in-depth, and its application areas have been continuously expanded, and it is developing in the direction of green, environmental protection and low carbon. Whether it is an admixture that improves the rheological properties of concrete mixtures, an admixture that can adjust the setting time and hardening performance of concrete, an admixture that improves concrete anti-corrosion effects, an admixture that strengthens the physical and mechanical properties of concrete, or makes concrete have special properties Admixtures, while improving the durability and working performance of concrete, have played an important role in reducing the amount of concrete and cement, and in the large-scale harmless disposal of solid waste and industrial tailings. A booster for the “carbon” strategy.
Solve national key engineering technical problems
China is the country with the largest concrete production and consumption in the world. As an important material for concrete, China's concrete admixture research and production technology is currently at the forefront of the world, and its output accounts for about 60% of the world. In recent years, with the development of China's construction industry, national key projects have continued to appear. In this process, the role of concrete admixtures is becoming more and more comprehensive and diversified.
The Hong Kong-Zhuhai-Macao Bridge crosses the Lingdingyang waters of the Pearl River Estuary. It is another super project in China after the Three Gorges Project, the Qinghai-Tibet Railway, and the Beijing-Shanghai High-speed Railway. In the entire bridge project, the island tunnel project is the control node part. The immersed tube tunnel connecting the east and west artificial islands of the bridge is the first super-large subsea tunnel constructed in the open sea in China, with a design service life of 120 years.
During the construction process, JSSB Advanced Materials Technology Corporation, as the only supplier of water-reducing agents for immersed tube tunnel concrete, aimed at the adaptability between water-reducing agents and high-volume mineral admixtures, through the molecular structure design of water-reducing agents, Improve the adsorption capacity of the water-reducing agent on the surface of non-cement powder particles, optimize the adsorption process, control and stabilize the slump, reduce the viscosity of the slurry, and enhance the stability of the concrete mixture. The application results of the past 4 years can show that the product has high water reduction rate, low slump loss, fast dispersion rate of mineral admixtures, and strong adaptability to the mud content of sand and gravel aggregates, which is a good solution. Production problems such as poor initial fluidity, high viscosity, and long mixing production time of concrete with a large amount of mineral admixtures.
In addition to the Hong Kong-Zhuhai-Macao Bridge, JSSB products are widely used in a large number of national and local key projects such as Tianwan Nuclear Power Station, Yangjiang Nuclear Power Station, Xiluodu Hydropower Station, Xiangjiaba Hydropower Station, Lanxin High-speed Railway, South-to-North Water Transfer Project, Qingdao Jiaozhou Bay Tunnel, etc. . In addition, as a leading enterprise in the concrete admixture industry and a leading supplier of new civil engineering materials in the industry, in recent years the company has been engaged in the research and development, production and sales of concrete admixtures, as well as in waterproofing and repairing materials, traffic engineering materials and other functions. New breakthroughs have been made in the development and promotion of sexual products.