Water reducing agent is a chemical substance added to concrete or mortar, which can reduce its cement content, improve its fluidity and workability. The process of action of water reducing agents is as follows:
1. Dispersion: The active ingredients in the water reducer can interact with the surface of the cement particles, change their Surface charge state, make the cement particles have the same charge, thus repelling each other and reducing the aggregation of particles.
2. Wetting effect: Water reducing agents can reduce the surface tension of cement particles, making it easier for water to disperse between cement particles, and improving the fluidity and plasticity of concrete.
3. Water reducing effect: Water reducing agents can change the rheological properties of cement slurry, increase its viscosity, thereby reducing the flow resistance of cement slurry, making concrete easier to flow, and reducing internal friction.
4. Stability: Water reducing agents can increase the stability of concrete, prevent premature loss of moisture, extend the setting time of concrete, and improve its strength and durability.
Overall, water reducing agents alter the surface properties of cement particles and the rheological properties of cement slurry, resulting in better fluidity and plasticity of concrete, improving construction efficiency and concrete quality.