The first generation of superplasticizers—naphthalene-based superplasticizers and melamine resin-based superplasticizers were developed in the early 1960s. Due to their better performance than ordinary superplasticizers, they were developed in the late 1930s. Lignin sulfonate is the representative – there is a significant improvement, so it is also called superplasticizer.

The second generation of superplasticizers is sulfamate, although in chronological order it is after the third generation of superplasticizers – polycarboxylate. The graft copolymer with both sulfonic acid group and carboxylic acid group is the most important and the best performance superplasticizer in the third generation superplasticizer.

The high range water reducer can reduce water by more than 20%. Mainly naphthalene series, melamine series and their compounded superplasticizers, of which naphthalene series are the main ones, and naphthalene series water reducers are often used to formulate high fluidity, high strength and high performance concrete. The slump loss of concrete simply mixed with naphthalene water reducing agent is faster. In addition, the adaptability of naphthalene-based superplasticizers to certain cements needs to be improved.