At present, several types of water reducer commonly used in the market are: lignin sulfonate sodium Salt water-reducing agent, naphthalene series Superplasticizer, aliphatic superplasticizer, amino high efficiency water-reducing agent, polycarboxylate Superplasticizer, etc.
Lignosulfonate: It belongs to the ordinary water reducer, its raw material is lignin, generally extracted from coniferous trees, lignin is made from the three kinds of lignin monomer, such as mellow, pine alcohol, mustard alcohol, which can improve the workability, fluidity, increase strength and reduce water rate in 5%-10%. Naphthalene sulfonate Superplasticizer: Is the earliest use of high efficiency water reducer, naphthalene through sulfuric acid sulfonation, and then the condensation of formaldehyde products, belong to anionic surfactants.
This kind of water-reducing agent appearance depending on the product can be a light yellow to dark brown powder, soluble in water, cement and many other powder materials, good dispersion, water reduction rate of 25%. Melamine Series Water Reducer: it is through sulfuric acid sulfonate, and then the condensation of formaldehyde products, so the chemical name is sulfonated melamine formaldehyde resin, belong to anionic surfactants.
This kind of water-reducing agent appearance is white powder, soluble in water, the powder material disperses good, the water reducing rate is high, its fluidity and the self repair is good. Powder Polycarboxylic acid ester: It is a new high-performance water-reducing agent developed in recent years, it has excellent water reducing rate, fluidity and permeability.
Obviously enhance the strength of cement mortar, but the production process is complex, the general price is higher. Casein: It is a kind of bio-polymer, it is the milk with acid precipitation and after drying through the cylinder.