Description of water reducing mechanism of water reducing agent

Water reducing agent is a kind of surface active agent, the groups of hydrophilic group and hydrophobic molecules of two parts, after it joined in aqueous solution, the molecular orientation of hydrophilic radical solution, hydrophobic groups to air, solid or nonpolar liquids and directional arrangement, directional adsorption film formation, and reduce the surface tension of the water and the interfacial tension.After adding water to cement, the flocculation structure is formed due to the molecular cohesion between cement particles and other factors.When water slurry after adding water reducing agent, the hydrophobic groups adsorbed on the surface of cement particles, directional point hydrophilic radical aqueous solution, forming a single molecule in the surface of cement particles or multimolecular adsorption film, and make it with the same charge, under the effect of electrostatic repulsion, the collapse of the flocculation structure and bound released a free water in the structure of flocculation, the effects of the dispersion due to molecular adsorption jianshuiji, makes concrete liquidity increased significantly.The water-reducing agent also thickens the solvent-layer on the surface of cement particles and lubricates the cement particles.