The appearance of water reducer can be divided into water agent and powder. The solid content of aqua is generally 20%, 40% (also called mother liquor) and 60%, and the solid content of powder is generally 98%.
Most of them belong to anionic surfactants, such as lignosulfonate, naphthalene sulfonate formaldehyde polymer and so on.
Extended data
Action mechanism of concrete water reducer
After mixing cement with water, due to the molecular attraction between particles, many flocs are produced, forming a flocculation structure, and some mixed water is sealed, resulting in low fluidity of concrete mixture.
After the water reducer is infiltrated, the surface energy of water or the interface energy between water and cement particles is obviously reduced, so that cement particles can be dispersed in water.
Due to the same charge on the surface of cement particles, cement particles are more dispersed under the action of repulsion; At the same time, the hydrophilic group of water reducer also absorbs a lot of water, which increases the thickness of water film on the surface of cement particles, strengthens the lubrication effect and makes cement particles easier to disperse.
Due to the interaction of the above three aspects, the flocculation structure of cement slurry is destroyed, and the closed mixing water is released, thus improving the fluidity of concrete mixture without increasing the mixing water consumption.
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