The principle of water reducer agent

The principle of action of the water reducing agent: the water reducing agent is usually a surfactant and is an anionic surfactant. It adsorbs on the surface of the cement particles to make the particles exhibit electrical properties. The particles repel each other due to the same charge, so that the cement particles are dispersed to release excess water between the particles to produce water reduction.
Here are some of the most widely used water reducing agents on the market.
Lignosulfonate: It is a common water-reducing agent. Its raw material is lignin, which is generally extracted from coniferous wood. The lignin is polymerized by three lignin monomers such as musk alcohol, coniferyl alcohol and sinapyl alcohol. In the mortar, it can improve the workability, fluidity, and strength, and the water reduction rate is 5%-10%.
Naphthalene sulfonate water reducing agent: It is the first high-efficiency water reducing agent used in China. It is a product of naphthalene sulfonation by sulfuric acid and condensation with formaldehyde. It is an anionic surfactant. The appearance of this kind of water reducing agent can be light yellow to dark brown powder depending on the product. It is easily soluble in water and has good dispersion effect on many powder materials such as cement. The water reduction rate is up to 25%.