In many concrete projects, traditional high-efficiency concretes such as naphthalene series are more and more unable to meet engineering needs due to the limitations of technical performance. A new generation of water-reducing agent, polycarboxylate water-reducing agent, which has attracted much attention at home and abroad, has a super-dispersed type because it has truly designed an effective molecular structure according to the mechanism of action of dispersed cement, which can prevent the loss of concrete slump without causing It has obvious retardation, high plasticizing effect at low dosage, good fluidity retention, large degree of freedom for cement to adapt to wide molecular structure, many synthesis technologies, and great room for high performance, which has a significant effect on concrete reinforcement.
It can reduce the shrinkage of concrete, the content of harmful substances is extremely low and other technical performance characteristics, endow the concrete with excellent construction workability, good strength development, excellent durability, polycarboxylate high-performance water reducer has good comprehensive technical performance Advantages and environmental protection characteristics, in line with the needs of modern concrete engineering.
Therefore, polycarboxylate water reducers are gradually becoming the preferred admixture for the formulation of high-performance concrete. According to reports, the usage of polycarboxylate water reducers in Japan has accounted for more than 80% of all high-performance admixture products, and North America and Europe also accounted for more than 50%. In my country, polycarboxylate water reducers have been successfully applied only in the Three Gorges Dam, Sutong Bridge, Tianwan Nuclear Power Station, Beijing-Shanghai high-speed railway and other large-scale national water conservancy, bridge, nuclear power, and railway projects, and have achieved remarkable results.