In many concrete projects, naphthalene series and other traditional high-efficiency concrete are increasingly unable to meet the engineering needs due to the limitations of technical properties.
Attention both at home and abroad of a new generation of water reducing agent, poly (carboxylic acid high performance water reducing agent, because really done based on the molecular structure of the dispersed cement mechanism design effective, has the ultra dispersible, can prevent the concrete slump loss without causing obvious retarding, higher plasticizing effect under low dosage, good fluidity retention, wide cement adapt to large molecular structure on the degrees of freedom and a lot of synthesis technology, has a very large room for high-performance, enhancement of concrete, reduce shrinkage of concrete, harmful substance content is extremely low technical performance, It endow the concrete with excellent construction and ease, good strength development, excellent durability, polycarboxylic acid series high-performance water reducer with good comprehensive technical performance advantages and environmental protection characteristics, in line with the needs of modern concrete engineering. Therefore, polycarboxylic acid series high-performance water reducer is gradually becoming the preferred admixture for the preparation of high-performance concrete.
It is reported that the use of polycarboxylic acid admixtures in Japan has accounted for more than 80% of all high performance admixtures, North America and Europe also accounted for more than 50%.
In China, polycarboxylic acid series water reducer has been successfully applied only in the three gorges dam, sutong bridge, tianwan nuclear power plant, beijing-shanghai high-speed railway and other large national water conservancy, bridge, nuclear power, railway projects, and achieved remarkable results.