What Is The Function And Classification Of Concrete Water Reducing Agent?

What is the function and classification of concrete water reducing agent?

Water reducer is the most important variety of concrete admixtures. It is an admixture that can significantly reduce the water consumption of concrete while maintaining the fluidity of concrete. Water reducer is an essential technical measure for preparing high-performance concrete. one. The addition of water-reducing agent increases the fluidity of concrete and improves the workability (while maintaining the same amount of cement and water-cement ratio); due to the reduction of water-cement ratio, it improves the strength and durability of concrete, etc. performance (while maintaining the same fluidity); or both.

According to the GB8076 standard, my country divides concrete water reducers into high performance water reducers (represented by polycarboxylate high performance water reducers), high efficiency water reducers (including naphthalene series, melamine series, sulfamate series) , aliphatic system, etc.) and common water reducer (represented by lignosulfonate) three types. In 2007, the total output of various water reducing agents in my country was about 2.8454 million tons, of which 175,100 tons were ordinary water reducing agents, accounting for 6.2%; 2.256 million tons were high-efficiency water reducing agents, accounting for 79.3%; high-performance water reducing agents were 414,300 tons tons, accounting for 14.6%. Each water reducer uses different raw materials and synthesis processes, and its molecular structure and performance characteristics are also different.