During the cement mixing process, because of the molecular attraction between the cement particles, they attract each other to produce flocs and form flocculent structures. The flocculation structure wraps part of the mixing water and reduces the workability of the concrete mixture.
The superplasticizer has hydrophobic and hydrophilic properties. The hydrophobic groups of the water reducer are oriented to adsorb on the surface of the cement particles, and the hydrophilic groups point to the aqueous solution and form an adsorption film. When the concrete is mixed, due to the directional adsorption of the superplasticizer, the surface of the cement particles has the same electric charge, the same sex repels each other, the cement particles are dispersed with each other, the flocculation structure of the concrete collapses, and the packaged water is released to supplement the cement mixing The required water effectively increases the mobility of the concrete mixture and achieves the effect of reducing water consumption. At the same time, the adsorption film formed on the surface of the cement particles due to the superplasticizer makes the contact between the cement particles and the particles more rounded and increases the workability of the concrete; the adsorption film also increases the surface area of the cement particles and promotes more hydration. It is helpful to improve the strength of concrete.
